In Chapter 1, Kiibo was worried alongside everyone else about what it would mean about the first motive, anyone who committed the first killing will graduate without holding a trial, effectively calling it a "First Blood Perk", aside from Kaito Momota, the Ultimate Astronaut, who became increasingly outraged with Monokuma for doing whatever he wanted and lunged at him. After the first trial, Kiibo told Kaito what he was supposed to do before he hit Shuichi.
In Chapter 5, as planned, K1-B0 and everyone else gathered in the gymnasium at nighttime, with Kaito bringing a vast assortment of weapons from Maki’s Research Lab. When that supposed missing person arrives riding an Exisal and supposedly pretended to be Kaito before "revealing" themselves as Kokichi, K1-B0, along with everyone else, believes that Kaito must have been the victim until later on in the trial, where the voice coming out of the Exisal changed to match Kaito's again. K1-B0, along with everyone else, was rendered depressed, stunned and silenced at the fact that Kaito ended up being the culprit of Kokichi's murder. However, he reassured everyone to smile, send him off in style, and that he won't accept their tears before proudly accepting his execution, but choosing to die on his own terms and not Monokuma's. During his execution, however, a bit of rubble was kicked up, knocking off K1-B0's "connector" to the outside world, making him unable him to hear the audience's voice, causing him to malfunction.
A girl on the internet named Princess Peachkid discovers a comic dub on YouTube about Tsumugi’s pairing between Kaito and Kiibo. Peachkid has the same opinion as Tsumugi, and a few months later, Peachkid gets the feeling that she and Tsumugi have so much in common. During the time that Peachkid was in love with Kiibo, she made a rule that perfection means ships with older men or his classmates that are male.
- Kaito and Kiibo are the first characters introduced in the Danganronpa V3 promo
- Kaito and Kiibo are on Shuichi’s team at Scrum Debate in Chapters 1 and 2