KuboKai

KuboKai is the slash ship between Kaido Shun and Kuboyasu Aren from the The Disastrous Life of Saiki K. fandom.

Canon
At first Kaido didn't have to much of an opinion on Kuboyasu until he saw him interacting with a group of delinquents and assumed he was one. Kaido being terrified decided to stay away from Aren, despite the fact that Aren was unaware that Kaido knew he was a delinquent and still attempted to befriend him. Kaido who was scared just decided to get on Aren's side, so that Aren couldn't attempt to beat him up.

However Kaido's initial negative impression of Kuboyasu was shattered after Kuboyasu rescued him and Saiki from a group of delinquents trying to steal their money. After that Kaido decided that Aren wasn't the guy he was in the past and the two soon formed a very close bond. It didn't take long before the two got on a first name basis. In Japan being on a first name basis implies that you're very close with someone. And Kaido considers the two 'Sworn Friends'.

Throughout the series the two still have an extremely strong bond with Aren protecting Kaido and Kaido swearing to protect Aren from the dark reunion. It should be noted that Aren was one of the few people that Kaido perused to have a friendship with while the others just happened over time. And Kaido was the first friend that Aren made after deciding to stop being a delinquent.

Quotes
"Why is he looking at the bat like it's his former buddy?"

- Kaido panicking, why Aren looks at the bat like this.

"From an Outsiders perspective you two look like that too."

- Saiki saying that Kaido and Aren look like a couple.

Fanon
KuboKai sailed as a result of Kaido's and Aren's close bond, the fact that Kaido and Aren got along so quickly and that Kaido managed to look past Aren's delinquent phase, helped to make the ship popular. The two are so close that others even make jokes about how the two look like an old married couple and even Saiki sometimes acknowledges it.

The ship is relatively popular in the fandom, with Kubokai being the most written ship in Saiki K tag, before Saikai. There's quite a few scenes with the two that could be interpreted as romantic depending on the viewers perception although there's not enough solid evidence to say that they're both romantically interested in each other.

The ship sometimes loses in popularity to Kaido's more popular ship with Saiki, but due the fact that Saiki is implied to be not interested in romantic relationship's, a part of the fanbase prefers this ship over Saiki x Kaido. Another rival ship for Kubokai is Kaido's ship with Chiyo, due Chiyo's confirmed crush on Kaido. But some fans prefer to ship her with Aiura Mikoto in order to pair the two off. Nonetheless KuboKai remains a fan favourite in the Saiki K. fandom, because of Kaido's and Aren's strong bond and hilarious friendships.

It is the most written for both of them on Ao3 as well as the most written within the entire fandom.

Fandom
FAN FICTION

TUMBLR

Trivia

 * Aside from Aren's family, Kaidou is the only person who calls Aren by his first name.
 * Their relationship shows good manzai dynamics as straight man x funny man.