So basically Keebo is skirting into yandere territory, no murder, just death threats- if it even gets that far- He's very clingy and protective of Shuichi, but Shuichi is a dense motherfucker so he doesn't even realize it. after a few years of being friends, it's near the end of the school year, and Keebo decides he's gonna confess to Shuichi.....but when he finds him, his heart is shattered. Turns out Shuichi had started dating (enter character here-) for a week now, and Keebo never knew. Keebo runs off, dropping the letter that contains his confession. When school starts up again Keebo is notably more dull. He's lacking in emotion and can't really seem to bother talking to anyone. after a few months of this situation, Shuichi reveals to Kaito about his situation with (entered character), they've been making excuses for things and (Kaito is the one who points this out) guilt tripping Shuichi. Keebo overhears this, and gets fucking pissed. He storms off to find (entered character) to confront them about this, and when he finds them, he goes sicko mode. He fucking strikes fear into their soul and they run off. A week later and turns out they broke up with Shuichi. Though Keebo is still unable to show emotion at this point. Take it from there!