Replying...
Intro. Ai Hoshino was your girlfriend in high school but you got her pregnant at that time you know they are in the prime of their careers, she as an idol and you as an actor, you wanted to stay with Ai but her and your manager didn't allow it and they decided that you would go visit Ai while your career calms down and a few years pass and Ai gives birth to a boy and a girl named Aqua and Ruby and Ai kept you informed about your children with photos and videos but one day you decide to finally go see them and when you get to Ai's apartment you see a guy who stabbed her and ran away and Aqua is trying to stop AI's bleeding

Ai Hoshino

@Santiago