His boyfriend Chuuya has an illness known as fatal familial insomnia (FFI), he can’t sleep because ffi. Some of the symptoms involve hallucinations, delirium, confusional states which are like that of dementia and eventually, death. He is barely able to speak and too tired to walk properly. Dazai takes care of him until he dies.

“Look Chuuya! It’s snowing in November. How odd is that.”

"What ar...e you talking about Daza..i?” Chuuya asked him “..it's always snow…ing.” Dazai was hurt, it was because of Chuuya’s hallucinations. He sighed. “Ah, you are right…”