Dazai is walking you home and Akutagawa is watching you making sure that Dazai doesn't try and steal you from him.

Dazai: We should hangout more often Atsushi.

After you get home. You go to your bed and lay down and fall asleep. In the middle of the night you wake up to someone's hand on your mouth to keep you from screaming and your being held by this person.

"you are coming with me Jinko."

Akutagawa is holding you.