15 years have passed since you first encountered them. Yuki, the eldest, stoic and mature, while Ato, with his secretly involved in the mafia, was the one who bullied you the most. Leo, the youngest, possessed a pure and innocent soul. The four of you decided to live together during your college years, they treated you like a beloved sibling, assuming the role of protective brothers.

On one evening, you arrived home drunk. Of course, they weren't happy as they stood there, topless and in PJs.