InuRyuu

InuRyuu is the slash ship between Inui Hiroyuki and Kashima Ryuuichi from the School Babysitters fandom.

Canon
At first, Inui used to give a bad impression to Kashima, since when he first entered to the Daycare Club in the moment when Kashima was changing Midori's diaper, Inui called her "crap factory", and so insulted Kashima's brother and the club itself. Though, Inui's goal was another one, when he told to Kashima that he was looking for his future daughter, Kashima gets surprised at it, since Inui was still in highschool just like him, and Ryuuichi pointed out that Sawatari (Midori's mother) was married, but Inui denies it by only saying that it was only a "small detail", for then saying that it nothing mattered in love, not even the age, and it only shocked Kashima more while he said that it wasn't only a "small" detail. Before leaving, Inui tells Kashima that it was logic that he wouldn't understand it, since he had no experience in love. Ryuuichi then remains frozen at Inui's comment, as he had left the place with his comment inside his mind.

When Usaida had woke up Ryuuichi from his state, Kashima asks him about Sawatari's husband and his status. Usaida tells him that he was outside doing business work, and that he was still alive. Kashima inmediately thinks that Sawatari might be cheating her husband with Inui, which leaves a bad taste in his mouth. Heading back to the daycare, Kashima founds Inui being trapped between the kids while Usaida was spectating the scene, and then Hiroyuki begs Kashima for his help. Inui then is seen extremely disappointed just when Ryuuichi reveals Midori is the baby that just he had called "crap factory" and disgusted him, as he said that Kashima lied to him in the morning, but Kashima says back that he never mentioned it before. When Sawatari arrived to the daycare with news about her husband, Inui decides on confessing his feelings to her, while Kashima was spectating the scene. Nevertheless, he gets interrupted by Midori who started crying. Sawatari tells Midori that her father would be back soon, and then both Kashima and Inui got shocked about Sawatari's sentence, since both thought that Sawatari's husband was dead (at least on Inui’s side).

After Sawatari had retired from the place, Inui is seen a bit down after everything that happened before, and then tells everyone in the daycare room that they could laugh at him if they wanted. Kashima intervenes while saying that he was being cool while talking to Sawatari, but Inui thinks that he was only being sarcastic at the comment, however Kashima denies it, saying that Inui was being someone mature. Hiroyuki then praises him back by saying that he was also cool for taking care of the kids from the daycare, Ryuuichi meanwhile is seen surprised at his answer. At the end of the episode, Kashima relates on how painful could be losing someone that is important to anyone, referring to Inui's case with Sawatari, and that Kashima wondered if he could find the true love in the future.

In the school festival, Inui gets "infatuated" with Kashima's female disguise, and he returns with the original Kashima to ask him about the "gentle" girl he had saw before, and then asks him if he could set a date for him with her since he didn't want to trouble "Inomata" (Kashima's disguise). At the day of the date, he's seen with a wig and a female uniform, which was how "Inomata" was, and so he was accompanied with Hayato acting as "her" boyfriend. When they both got to see Inui, Hayato introduced "Inomata" as his girlfriend in order to break Inui's infatuation as part of Yayoi Kumatsuka's ploy. Inui is sorry about it, and tells them that he was at least happy for meeting "Inomata", and then Ryuuichi (who felt guilty about the situation), was about to reveal his true self but then he trips and falls on Inui, which makes him blush at it. Ryuuichi keeps the secret, compelled by how Inui looked like at the moment.

When Kotaro decided on bringing Kashima's food to him, Usaida secretly had asked Inui for looking for Kotaro in exchange of giving Inui a photo of a disguised Kashima (as a girl), and so even if Inui had hesitated at the offer, he accepted it.

In the manga, while Kashima and the kids, along with Hayato were searching for a lost panda inside the school, they hear rustling from the bushes and a shout “Hey! Get down, you two!”, and then Inui appears sending Kashima to the floor while warning him about certain panda who was in the school facilities, because Inui had seen big footprints moments before. Ryuuichi wonders that it was probably a panda, but Inui didn't have none of it. It was then that Usaida reveals he was the one who messaged Inui about it, thinking it would be interesting, but he didn’t think Inui would actually believe it, and Inui is seen mortified, trying to convince himself and the others that he knew that everything was a joke and he was only playing along. Ryuuichi apologizes for making him worry about it.

Soon, Kashima decides to reveal Inui that actually "Inomata" was actually him in a woman disguse, and once, when he met Inui in a place (along with Kotaro, who was disgused as "Inomata's sister" too) he could finally do what he proposed before and at the moment when he revealed his identity as "Inomata", Inui remains in shock at it, as he couldn't believe it and that everything was sudden for him. Some time later, even after Kashima confirmed that he was "Inomata", Inui was still infatuated with Kashima disguised as a girl, and so he notices that he still loves that person, even if it turned out to be Kashima, who clearly didn't had bad intentions for breaking Inui's feelings.

It can be also revealed when in chapter 92 of the manga, Inui had given tickets to the aquarium to Kashima and then, during classes, he was still thinking about "Inomata", and he thought on a "date" when he invited Kashima along with his brother to the aquarium. When they arrived, Kashima confesses that he was wondering if he had misunderstood Inui, and that he felt sorry about it. But then Kashima says that Inui had also a caring side with him, and after the comment, Inui gets flustered and gives Kotaro back to Kashima while denying everything that he said, and a moment later Inui confesses that he liked both Kashima and Kotaro normally and that was the reason on why he had invited the two of them. Nekota (one of Inui's classmates) then appears on the scene while asking Inui if he was happy being with his friends, and Inui explains her that Kashima and Kotaro weren't his friends, and at the comment Kashima is seen a bit sad while saying that he thought that Inui and him were friends, while Inui complains and says in confusion that he was his kouhai. After both had finished their tour in the aquarium, Inui gives Kashima some white spotted eel decorations, white Nekota was suspecting that they had extorted the spotted eel from her before.

Fanon
It sailed due to Inui's attraction to Ryuuichi, even if their interactions weren't friendly at first. It was unknown whether if Inui's crush was only towards "Inomata", until manga revealed that it was also directed to Ryuuichi too. Some fans find the ship cute, although they tend to prefer Hayaryuu more, but still has a bit of supporting. For those who can't choose between both ships, they go for a polyship between the three. On AO3 it's the most written for Inui and the second most written for Ryuuichi, it is also the 6th most written ship of the School Babysitters fandom.

Fandom
FANFICTION

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