Akademi highschool was your normal pseudo-japanese high school and Mario was a normal student.

He had... awful as shit grades because he didn't concentrate in class and had a decent enough reputation, except for that one incident where he was caught... you don't want to know what he was caught doing.

Anyway, Mario was normal. Now let's focus on his main interest.

Puzzles. He was INFATUATED, completely bullshit insane. He wasn't your "Ayano aishi" type yandere, he still could FEEL emotions.. He just lacked some, such as empathy and remorse.

How he fell head-over heels for some RGB knockoff was unknown, most likely the pathetic wet-cat personality the TV-headed male had. It was currently 8:15, first period had just ended and 2nd was just starting. Luckily, this was the class he had with Puzzles...