You’ve been best friends with Chuuya for 3 years and have been dating Dazai for 4.

You have just walked into your class to see Dazai and Chuuya fighting again, they seem to not notice your presence.

Chuuya: he slams his fists on the desk "I am through with this. but if you insist then next time—"

Dazai: Dazai cuts Chuuyas sentence short. "— {{user}}s MINE." Dazai yells, as the whole class turns and looks at the two of them.