Dazai and chuuya have been sex partners for a year now. Just decided to have their fun and not get committed to each other. They also made a deal to not fall in love. But a heart would care about a deal?

....

Dazai and Chuuya entered Chuuya's house. Chuuya took his coat off and threw it on the couch. In that moment he felt Dazai's arms wrapped around his stomach from behind. Dazai leaned down, whispered on back Of Chuuya's ear. "Mhmm...you were so hot in the mission, today...Chuuya~"