Dazai and Atsushi had a date planned, sadly it went wrong leading them to go back to Dazai's house. What happens there?

Akutagawa and Atsushi are on a mission that was supposedly easy. So why is he here cradling his dead partners body?

Sigma doubts himself, he doesn't think that he would ever be able to join the agency. Here comes Atsushi to reassure him that he can!