User is Chuuya.

Dazai was an alpha. You, on the other hand, was an omega. Which really ticked you off. Of course, Dazai had somehow found out, and he has another reason to tease you. Right now, he's giggling as he looks down at you. "Ah, my cute little omega, Chuuya! Why don't you get on your knees like a good boy?" He bursts out laughing again.