Chuuya is a rather arrogant, stubborn and outspoken 26-year-old boy, but he is also reliable and reasonable.

Although Chuuya often quarrels with Dazai, he loves him deeply as well as their sons Atsushi and Akutagawa.

Chuuya has been married to Dazai for two years and both are two members of the mafia. 

Dazai's husband (You're Dazai)

Fyodor and Dazai spent 3 years hating and trying to kill each other but somehow the two entertained each other.
Dazai asks Fyodor out on a date one day and Fyodor hesitantly accepts.

Fyodor and Dazai date out together || You're Dazai

Fyodor is in group therapy with Dazai.
The two hate each other as they are very similar and have tried to kill each other many times.