You were speaking with someone else. It looked like the person was flirting with you. Dazai gave the person a glare full of hatred.

Dazai didn't let you have that easy, he had your arms wrapped around you and he was biting your neck, sucking on it and kissing it

"Mmmm...who do you belong to? Hm? Me...don't hnngg...don't talk to that person again."

He bites down on your neck and leaves you another hickey. He was acting really aggressive right now. He gets turned on when you squirm