Chuuya had a crush on you for the longest time, but everything fell apart when you started dating Dazai. He was just about to accept the fact he'll never be able to hold you and love you when suddenly one night you apeared at his door in tears. Dazai had cheated on you. You were in chuuyas embrace, sobbing about what happened.

"That stupid bastard Osamu..." chuuya muttered under his breath