Hayaryuu

Hayaryuu is the slash ship between Kamitani Hayato and Kashima Ryuuichi from the School Babysitters fandom.

Canon
When Kashima met Hayato for the first time, he thought that he was that type of person because he punched his little brother on the head, but then Kamitani tells Kashima that he have to go to see his little brother (Kotarou) because he felt alone without him. When Kotarou got sick, Kashima inmediately ran right to Hayato and asked him if he could guide him to the nearest hospital. Kamitani didn't think it twice, and he left his little brother in care of his mother and helped Kashima giving the right direction to the hospital. The next day, Kashima thanks Kamitani for helping him and then he went to class where he noticed that Hayato was there too. While he was introducing himself, he looked nervous, but after he saw Kamitani, he got calm and then gave a little smile to him and then finished his introduction.

Anime moments
When Kashima was heading to his classroom, he felt uncomfortable because the people surrounding him were giving him a stare and he thought that it was him that he was getting many weird stares. When he asks Kamitani if he had something in his face, he asked in response what was he doing with the kids tagging along behind him. Ryuuichi panicked and apologized to the people surrounding him and then asked Kamitani if he could help him taking the kids back to the Daycare center, which Kamitani accepts.

The next day when the kids with Usaida and Kashima were going to an excursion, Kamitani passed right where they were and then he asked Kashima if he could leave his little brother in his care, which Ryuuichi accepts and then he asked Kamitani if he forgived his little brother already (because he punched him again), he said that he didn't really liked him and then his little brother hears what he said and ran to another place of the excursion with Kotarou. Before Kamitani left the place, he told his little brother not to cause problems to Kashima and everybody else, showing that Kamitani cares about Kashima first than another people. After the excursion, both guys are showed up walking together back to their homes while carrying their brothers. When Kashima asks to Kamitani that if he was worried about his little brother, he said that his mother found him in the baseball team and then smacked him telling that he needed to be with his little brother. Kashima smiles while he said ''Even so, i'm glad. He was lonely without you, and Kamitani's little brother, which it was asleep, he said that he loves Kamitani and then he blushed a little while he replied; Idiot, i don't really hate you either''. Kashima laughs and said that Kamitani can blush too, which Kamitani complains and tells Kashima that his little brother (Kotarou) likes him too much, and we can see Ryuuichi complaining about that.

When they were in the P.E class, which it was cold out there, Kashima asked Kamitani if he was cold, which Kamitani said in a sarcastically tone: No, i'm so cold, i could die, showing no expression about having cold, which Kashima laughs a little nervously. Later, when Takuma and Kazuma were calling their father, we can see Kashima and Kamitani holding them while they were right next to each other.

The next episode, Ryuuichi it's showed with an invitational poster in his hand for the Gakuen Club. When Usaida asked Ryuuichi and the kids if they wanted to check out the other clubs,  they agree and Kamitani's little brother suggests that they will see the baseball club too (which Kamitani was) and Usaida agrees at that. When they finish checking out the other clubs, they went directly to the Baseball club, which Ryuuichi notices that he was there and then Taka (Kamitani's little brother), tries to call his brother, and when Kamitani notices that, he just ignore him and then he cried out loud. Kamitani punches his brother when he went directly where Ryuuichi and everybody else were and Kashima apologized saying that it wasn't his intention for interrupting him while he was in his practiced. Hayato said that it was okay, that his club was weak anyways. After everybody left the Baseball club, Kamitani tells to Taka not to disturb Kashima which Taka yells and says that he doesn't bother him. When Kashima was distracted by looking another club thinking that they were having fun his little brother notices what happened and when Kashima asks Kotarou if he wanted to go with him to stick the poster, he rejects the offer and Kashima shocked because he didn't expect that answer. When Kashima arrived to where he was going to stick up the poster, he kneeled down thinking that maybe his brother didn't want him around. When he was in his thoughts, someone hits his head with a paper and when he lift his head, he saw Kamitani with his brother in his arms and then he asks if he could join the Gakuen Club. Kashima was a little confused and he said that if he wanted to join the Baseball club too, which Kamitani says that if they were talking about that, he would accept, but they were talking about the Gakuen Club. Hayato gives Ryuuichi the membership to the Gakuen Club and then he said apart that this dude invited him to the club. When Kamitani gives Kotarou to Kashima, he explained that Kotarou was dragging him by the pants and then Usaida was interpreting the situation. He also said that Kashima looked miserable and Kotarou thought that he helped him in that way (dragging Hayato to Kashima). After that, Usaida made matching aprons to both guys with their names.

In the Inui's incident, Kashima asks Kamitani what does he think about the Adultery, Kamitani asks in response that if that wasn't something for the people involved to decide. Kashima complains that they're talking about an affair about someone who has a child already, which Kamitani only says; At the end of the day, it's their problem, isn't it?, Kashima stays in silent after he said that to him, pondering about his past when a similar event happened in his childhood.

When Kirin and Taka were fighting about if witches and heroes were real or not, Kamitani was about to say neither of them were real, Kashima shuts him with his hand covering Kamitani's mouth saying that he don't have to destroy the children's imagination. Later, Kamitani tells Kashima that he have to tell them already that both witches and heroes aren't real but Kashima says that he don't want to destroy the child's dreams. Also, he says to Kamitani that he might believed in that kind of stuff when he was young, or maybe not. Oh yeah, i tried to practice a launch that disappears, but someday i will make it, so that's different.

When Ryuuichi forgots his lunch, Kamitani asks him what did happen that he was a little concerned. He said that he forgot his lunch in the Daycare center, and told him not to speak while his mouth was full. While Ushimaru offered her food to him, he rejected and then Usokawa and his classmates gave him mountains of food like their feelings toward Kashima. Kamitani pats Ryuuichi's shoulder while saying: Aren't you lucky to have classmates like that? Kamitani...- Ryuuichi replied. Meanwhile, when Kotarou was giving Kashima his lunch, his classmates worried about Kashima's full belly, and when one of them was about to complain in high voice, Kamitani shuts him with a bread he had somewhere, showing that Kamitani doesn't want anyone to hurt either Kashima and Kotarou feelings. Next, when they arrived to their class, Kamitani asks Kashima why is he walking around with an apron, which Kashima notices and asked Kamitani why didn't he tell him if he noticed. Also, Kamitani adds that Kashima's butt was full of stickers. Saying that he's surprised that he couldn't notice while the kids were adding stickers in his butt, Kashima blushes really bad and he complains that he could tell him about those things earlier.

When Kashima received a love letter, Kamitani checked out first to affirm if the letter was just a prank or not, showing that Kamitani worries about Kashima feelings and that he would check out his actions that could hurt him or not. Later, when Kashima thought that he losted Kotarou, Kamitani appears with Kotarou in his side saying that he went into someone's yard for getting a lemon. After Kashima rejected the girl who sended him the love letter, Kamitani asks if he was sure, that he seemed excited about it, while Kashima says that he wanted to keep his brother as the primary priority.

In another episode, we can see Kamitani calling Ryuuichi asking if he was free that day because they were going to a festival with their brothers, which Kashima says yes and then both guys passed their phones to their brothers so they could invite each other personally. When they arrived, Kamitani asked Kashima why was him and his brother wearing formal clothes (yukatas) which Kashima says that Saikawa and Obaa-san prepared it for them.

There were a lot of moments of them and their brothers in this episode like; they went to buy cotton candy to their brothers, catch golden fishes and more things. When Taka loses his sword, Kashima proposed to find it, which Hayato almost disagrees. Before doing something, Kamitani told Kashima that he should go back to enjoy the festival, because Taka was causing many problems, but Kashima says that even if he isn't in the Babysitting Club, he would search the sword. We're friends, right?. Kashima said that unconsciously and he was wondering if he was the only one who thought that they were friends, which Kamitani replies; ''You're really incredible. If he wasn't my brother, i wouldn't even take care of such a troublesome brat''. Kashima got surprised at his answer, but at the same time, his comment made cry Taka, after that, Kashima tells Hayato to stop making him cry. After that, they went in a search for Taka's sword in all the festival, even if doing that would be hard and would cause many problems. When they were about to give up, Kamitani told Taka that he had to give up. Taka hesitated but Kamitani said that in exchange, they would bring him to the Rope Game and told him that he has to bear with it. Ryuuichi it's showed to be moved by Kamitani's words and then Hayato said that he needed to thank Kashima for helping him finding his sword, that he would be given up if Kashima didn't suggest them to find it. After they found it in the Rope Game, the guy in that game apologized and give in exchange a Coin bank with a PS3 style to them.

In the beach scene, it shows Kamitani and Kashima talking in the water. Kashima told him that it wasn't his first time going to the beach with his brother, saying that Kotarou was still a baby so he doesn't remember it. ''But he wasn't scared of the water back then. Kotarou... i guess he just doesn't trust me''. Right after he said that, Kamitani hits Kashima's head while he complains and asks him if he does always hit his brother that hard, but Kamitani replies that he only hit him about a half as hard. ''The reason Kotarou wasn't afraid then, is because he was just a baby who understood even less than he does now. Don't say such stupid crap''. After he said that, Kashima felt okay in that moment, saying that Kamitani was right.

When Kashima saw Taka with a bloated face, he quickly asked Shizuka (Kamitani's mother) what happened to him, she shows him a ball with a Poo-like scribble in. She said that it was Hayato's treasure he held for a long time. You're not telling me he got angry and hit Taka really hard this time!?- Kashima asked in panic.

Surprisingly, Shizuka said that Kamitani ignored Taka after that. Also, she asked Kashima if he could check out Kamitani, which Kashima accepts. After Kashima convinced Kamitani to talk with him, he wanted him to apologize Taka for what he did, but obviously Kamitani rejects saying if Kashima was referring him as a childish person and that he should stop being angry already and forgive him. Kotarou broken a lot of my things too, i understand the feeling of really not even wanting to look at his face- Kashima added. Kamitani seems interested on that and he asks if something similar happened to him. Kashima explains everything that Kotarou did like Kotarou breaking a Matchstick model of Osaka Kashima spended 2 weeks for that, sribbled the homework Kashima finished without sleeping all the night, also when Kotarou stole Kashima's phone and throwed it to the toilet. Especially with the phone, it had messages from my parents, i'll never get any more of those- Kashima explained. Kamitani pat Kashima's shoulder while saying Cheer up. Hayato said that in his case, it was the opposite, explaining that he really didn't care about the stuff but the intentions of Taka. He also adds that if he tell him to apologize, Taka yells and become unreasonable, but in the end, he had to deal with it. After school, when Taka and Kamitani apologized, Kamitani asks Kashima if he will be in the daycarem which one says yeah and then Hayato adds that they will be playing baseball with the kids and with Taka too, Kashima complains a little.

In the parents meeting, Usaida made suits for the kids and for Ryuuichi too. When Kashima wore the suit and Yayoi scare him, he fell and the kids rolled him to the entry, which Kamitani soon appears right there and wonders what was that big cob doing blocking the way. Kashima replies that the big cob was him and asked Kamitani if he could help him to get up which Kamitani accepts.

In other episode, it shows that Kamitani punches Taka in the head by any reason while Kashima asks why his first reaction was always the violence, which one says that he hits people who don't do what he says, then his mother punches him in the head too. When Shizuka asks everyone if they wanted to see chick eggs hatching, everyone agree with happiness while Hayato apologizes to Kashima that his mother got the kids excited, which one turns to Kamitani with shinning eyes. Kashima got nervously altered by his reaction and explains to Kamitani that he can't help but wants the chicks to follow him around in a linem while Kamitani replies that the kids do that all the time too, ehich disappoints Kashima saying that that might be enough too.

After Usokawa invited his friends also Kashima and Kamitani, Kashima arrived first and then Kamitani. Kashima asked Kamitani what was that bite mark in his cheek, Hayato told him that his brother was screamming Bring me! and he bite him, and he hit him and then left the place. Kamitani also asked if Kotarou didn't cry, which Kashima answers no and adds that he was quiet when he left the Morinomiya's residence.

In Chirstmas Day, when Kamitani was about to say to Taka that Santa wasn't real, Kashima covered Kamitani's mouth with his hand for second time saying that if he said that, he would destroy Taka's dreams.

Also, when Kashima asks Kamitani where he was going, he said that he was going to skip class. After we notice from Ryuuichi that actually, Kamitani went to the chairwoman's office to ask Obaa-san that if she could buy a new phone for Kashima, which one accepts and in the end of the episode, we can see Obaa-san giving Ryuuichi the phone Kamitani asked for buying it.

Manga
There are many moments about this ship throughtout the manga and a missing part to the anime. The missing part was:

While they were going to take a photo in the Parents meeting, Kashima asks Kamitani where his father was, Kamitani says that he is divorced and it's a person that Kashima already knew.

Next day, when Kamitani and Kashima were going to their classroom, Kashima said that he thinks he's forcing a secret out of Kamitani, while he says that it was okay, that he didn't plan to keeping it from him. When Kamitani retires from the teacher's lounge (where his father, his chemistry teacher, Hebihara Taizo was), Kashima notices that he had a really hurt expression he never saw before, and when he entered to the teacher's lounge, he gives instead of a reflection, he gave Hebihara a summary about the stories of Kamitani and his brother in the Daycare center, showing how much Kashima cares about Kamitani's feelings and also his family. ''Kamitani-kun who always looks calm, had shown a really hurt expression which i've never seen before. My family... may be differ from Kamitani-kun's, but this kind of thing is definitely wrong!!. No matter how hard we try, we'll never be able to meet with our parents again. Why is that,  even though they're so close to each other, he has such a cold face when he's talking to Kamitani-kun? He doesn't even visit Taka-kun. I don't get it.

Quotes
'I really like the team i am right now. Also you, and the little brats at the Babysitting Club. Besides, Taka's too spoiled. I can't leave you and the old hag and go somewhere else'.

— Hayato to Kashima in chapter 85.

(To Inui) If you ever dare to hit that person when you talk to them, i'll send you flying to the sky.

— Hayato talking about Kashima to Inui in chapter 43.

Fanon
This ship sailed as result of their strong bond of friendship and also, fans like to joke about Kotarou being the wingman of this ship because his several moments Kotarou made Kashima and Kamitani closer. Also, they joke that Usaida might ship them too because of several moments he did almost the same thing as Kotarou. This ship supports Inomaru because the same reason but for these two girls, also, this ship have a rival too: Inuryuu, which one doesn't have a big popularity, but it's a really known ship in the fandom.

On AO3, it's the most written ship in the School Babysitters fandom also the most written for both characters.

Fandom
FAN FICTION

Kamitani/Kashima tag on AO3

TUMBLR

Hayaryuu posts on Tumblr

Trivia

 * They're always seen together in every part of the manga and anime.
 * Kashima said in total 186 times Kamitani's name throughout the manga.
 * This ship can be considered as "The perfect Shoujo Couple".
 * In the chapter 25 of the manga, Usaida told to the kids that he wouldn't chase after Kashima and Hayato, after that, he added: More like, they're all lovey-dovey.
 * Some people can theorize that Hayato invited Kashima to a double date with him and their brothers. Also, they added that in some Shoujo's mangas, the main character (in this case Kashima) wears a yukata while the love interest (in this other case Hayato) wear casual clothes, which happened in the Festival episode.