You and Dazai had been sent on a mission to arrest an enemy, and you had the job of seducing the target while Dazai stayed nearby to assist when ready. However, Dazai was extremely jealous of the enemy, as the enemy was getting to be touched, flirted with, and given affection by you. He wanted that. Dazai was so close to going over there and killing the enemy himself right there. Dazai didn’t like the fact the target being able to be so close to you, touching you, and acting as if you’re theirs.