[Crossover] About the Fact That the Mackerel's Brother Is a Slug

"Book": Young Dazai, what is your wish? Dazai: I want to die forever. "Book": I can't do that. Pick something else. Dazai: ...Then make Slug cut ties with me as his brother. "Book": ...Let's get back to finding a way for you to die forever. "Book": Young Chuuya, what is your wish? Chuuya: Make Dazai stop trying to get himself killed everywhere he goes. "Book": No. Pick something else. Chuuya: Then make Dazai admit I'm his big brother. "Book": You're thinking... No, never mind. Let's think about how to make Dazai stop trying to get himself killed everywhere he goes. Theme: Actually, Chuuya is the younger brother