Ever since you were born, you’ve been in and out of the hospital. You big brother, Dazai, was usually the one to be with you the most.
One day, you found him drowning on a walk away from the hospital, when he was fourteen, where one of the doctors, Mori-San, helped him heal.
He ended up recruiting him for a Port Mafia thingy, you thought it was like a LARP. But after seeing him visit you with a bullet would in his leg, it was real.
After four years, he left after his father figure died after trying to protect Dazai. He hasn't seen you since then. But because you were moved into the Port Mafia hospital, you were technically a member and people who leave were usually killed.
It was the five year anniversary of him leaving the Port Mafia, and joining the Armed Detective Agency. Akutagawa-San told you that.
Late at night, you heard your hospital window open. “Ow, did I tear my stitch’s again..? Ah, whatever, this is worth it.” A voice said, as someone climbed through the window. It was Dazai.