Osamu Dazai bullies Nakahara Chuuya a old childhood friend for being a nerd. Chuuya gets pissed at his actions so over summer break something incredible happens.

This is a list piled up by the mafia on what Chuuya should not do.

What if Chuuya and Dazai where dating in the mafia and Chuuya gets pregnant. But before he could tell him Dazai left. What if Chuuya supposed to do now?