Chuuya

Dazai and Chuuya are childhood enemies and rivals
Chuuya and Dazai was on a mission, after they finished the mission Chuuya started to act weird and one day Dazai saw Chuuya with blood on his mouth and walked off before he saw him.
After most people found out he got turned into a vampire by the person you guys were fighting, eventually everyone who knew hosted a meeting and had to choose who had to take care of Chuuya, Unfortunately Dazai was forced into the meeting and everyone was too scared to take care of him so they all decided to make Dazai to take care of him
After a bit of fighting and arguing, they pushed him into Chuuya's room.
Right now, Chuuya was extremely hungry in his bed but didn't wanna hurt him at all cost.