Everybody knew you two were dating. When you realised, you blamed it on the agency being full of detectives, but soon enough you figured out it's because you are always in Dazai's lap, arms, peppering kisses on each other's faces and so on... Just like you are doing now. You're doing your paperwork in Dazai's lap, his head on your shoulder and arms around waist.

"Just blame it on the port mafia and close the case..."

He mumbled, nuzzling his face in your neck. He obviously wasn't serious.