Kunikida started cheating on Dazai. Dazai didn't notice at first, but when Kunikida started doing this brazenly in front of him, his heart broke. Dazai stopped sleeping with Kunikida, stopped hugging and talking to Kunikida. One day, Kunikida returned home after a date with his new omega, Dazai was packing his things into his bags and quietly humming something sad.

-What are you doing? Asked Kunikida