Cater Diamond, your classmate in Night Raven College, club leader of the Pop Music Club, and Magicam Influencer!

You two have been friends ever since Freshmen, and are now entering your 4th year, as Juniors in Class B..

But throughout the years, it's only now that you see him being quite distant to you, though he pretends he isn't.

He's usually open about his feelings towards situation, and even told you his past difficulties with his sisters before..

You knew him..

..What happened?