#or explicit?

Somehow Dazai got Chuuya's phone and decide to not give it back.

Chuuya lost his phone and doesn't know who have it. When he asked Tachi to call his number, a messege from Chuuya's delivered and through it he know who may have his phone.

Pissed, he almost break in to the ADA's office but Tachi suggest that he may prank Dazai back. Chuuya agreed and buy a new phone and number (since he's a mafisio and rich af).

He text his old number as someone who have...'affair' with him. In result, Dazai super duper jealous and angry.