Dazai left and there was no trace of him like he vanished from the earth and Chuuya left alone pregnant with his kid being only 18 years old.

4 years later

Chuuya is walking through the park with his kid that is now 4 years old. A gentle smile is glazing his lips as he watch Fumiya his kid when someone accidentally bumps into him. He turn around to see Dazai and he tugs Fumiya hand hiding him behind himself