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- I've always liked you, Kaidou. But I thought if I told you, it might be a burden for you. There are some things you can't say even if you trust and loved them.
- —Chiyo to Kaidou.
YumeKai is the het ship between Kaidou Shun and Yumehara Chiyo from The Disastrous Life of Saiki K. fandom.
Canon[]
At first, Yumehara is in love with Saiki, but her love for him starts to fade away since Saiki does everything he can to avoid her. Yumehara eventually gives up on him, then quickly falls in love with Shinoda Takeru for sharing his umbrella with her. After dating him for a while, she becomes jaded with his ill-mannered tendencies, like being rude to employees and having a tacky taste in clothing. After her last date with him, she screams “we’re through” and runs out the door. She diverts her attention back to Saiki.
Beach Episode[]
When they go to the beach, Yumehara is in her bathing suit, expecting Saiki to be in awe at her body. However, no one pays attention to her, so she is engulfed by sadness and covers herself in a towel. Kaido asks her if she’s going to get in the water, to which she replies, “Go away, I’m not feeling well.” He wonders if she can’t swim either, and she says she can but she doesn’t want to. Kaidou once again goes into his chunibyou monologue, saying that he’s been cursed by Posideon so he can’t swim. She realizes that he’s using that as a lame excuse for not being able to swim, and he recoils in embarrassment, which Yumehara mistakes for him being in awe of her body. Teruhashi appears and asks Kaido if he’s seen a ball roll over here, which makes him flip back three times, and Yumehara is surprised at the change in reaction. Suddenly, two guys start hitting on Teruhashi, which makes her feel uncomfortable. Yumehara angrily steps up and defends her, yelling “she doesn’t want it!” Because of this, the guys start making fun of Yumehara's body, which makes Kaidou go rogue. Angrily, he tries to punch one of them, and Saiki uses his powers to make the guy believe it did hurt, so the two guys run away. Yumehara instantly falls in love with Kaido because she thinks he is the one who did that.
Near the end of season one, Yumehara becomes quite overweight from eating so many snacks. When she goes to school, Teruhashi and Mera are surprised at the weight she’s gained and are hesitant to tell her about it, but they eventually do tell her. After school, Saiki spies on her trying to do push ups, but since she is too heavy she doesn’t have enough strength to even do five. Saiki talks to her through telepathy, disguising his voice as Kaido’s to give her a motivation. She sees an upgraded version of him in a vision in which he becomes almost like a training coach to her, using insults to get her to exercise. Hours pass and she is still doing push-ups. The next day, Yumehara is back to her normal self again. In the halls, she meets up with Kaidou and he asks her a little favor, to which she bows down like a loyal servant and yells: “Yes sir whatever you want!”
Valentine's Day[]

Saiki spying on Yumehara and Kaidou's "date"
Yumehara makes a letter and a chocolate to confess to Kaidou and puts them under his desk, but Nendo eats the chocolate when he sees it under Kaido’s desk. The letter and chocolate were supposed to go together, since the chocolate said “love” on it, but the letter just asked for them to be “more than friends,” which Kaido decodes as being “sworn friends.” Kaido accepts her feelings in a platonic kind of way, but Yumehara thinks that they are now dating. After school, Kaido and Yumehara walk home together, and Yumehara, still thinking their dating, holds his hand. Kaido feels uncomfortable holding hands with a girl and puts his arm around her, which makes the misunderstanding even worse. They sit down on a bench for a while, and Kaido says, “I never knew you wanted to be sworn friends with me,” which shocks Yumehara because he got the wrong message. Kaidou is a little disappointed, but still says thanks for the little present. After Kaidou left, Yumehara feels really bad, but then smiles because she knows she can get closer to him. Both are really nervous during the entire "date". Meanwhile, while they are walking, Saiki tells himself they should forget the cookie and just get married.
Castaways / Ship Sink Arc[]
During these episodes, Saiki's friends are trapped on an desert island. There are many times where Yumehara wants to be with Kaidou and occasionally hugs him. It is also revealed that while Kaidou was sick on the ship, she threw the pills to the sea so that she could use taking care of Kaidou as an excuse to be around him, but then Saiki got sick and she pretended she didn't know about them.
Fanon[]
This ship is quite popular inside the community, only rivaled by KuboKai and KaiSai for Kaido and ChiyoMiko for Chiyo. It's the most popular het ship between these two, though it’s only the third most popular ship for Kaidou. It's mostly shipped because Yumehara is completely in love with him and hasn't given up like she did with Saiki or her ex, and Kaidou is always nervious around girls but especially nervous around Teruhashi and Chiyo.
This ship started sailing in the beach episode after Kaidou stood up for Yumehara, and since then Chiyo fell in love with him and tried her best to get him to notice her.
Fandom[]
TUMBLR
- Kaidou x Yumehara posts on Tumblr
- Kaidou x Yumehara posts on Tumblr
FAN FICTION
- Kaidou Shun/Yumeraha Chiyo tag on AO3
WIKIS
Trivia[]
- It's already confirmed that Yumehara has terrible luck with love and changes crushes constantly, but when Aiura told her to "give up to your actual crush" (who in that moment was Kaidou), she didn't.
- She did give up with Saiki and her ex.
- It's shown that Kaidou is really shy when it comes to girls, especially Yumehara and Teruhashi.
- Yumehara prepared Kaidou a letter and a cookie for Valentine's Day for him.
- Kaidou didn't find the cookie, but he told Yumehara not to worry, since he was satisfied with the card.
- Kaidou's name is derived from the Japanese term for Teleportation, while Chiyo's name is from the word Prophetic Dreams.
Gallery[]
Anime[]
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SHIPS | het | SaiTeru • Saiai • YumeKai |
slash | KuboKai • KaiSai • Saikechi | |
femslash | ChiyoMiko • ImuTeru • TeruAi | |
poly | PK Psychic Trio | |
cargo | SaiCoffeeJelly | |
CHARACTERS | male | Saiki Kusuo |
female | Aiura Mikoto • Teruhashi Kokomi |