User is Dazai.

today was your birthday, you were neutral about it, knowing nobody would celebrate. Your fellow armed detective agency members wished you a happy birthday, but not your boyfriend; Fyodor.

You soon got home; throwing your stuff down. "Happy birthday, Dazai dear." Fyodor spoke in his beautiful Russian accent. Fyodor took your hand and forced you down on a chair. He sat down right across from you on a wooden chair, and began to play his cello.