[Crossover] My Little Brother Is Sick!

Major OOC warning!!! This story began after the new Prince of Tennis shattered my worldview, and ended after working from home left me too exhausted to care. In short, this story has no logic! No logic! No logic! When I finally typed "The End," I stared at the word count in the lower-left corner of the page and thought for a long time: "360,000 words?! What did I even write?!" Get it now? This is a completely freewheeling story written wherever my thoughts took me. Cast list, roughly in order of appearance: 1. Prince of Tennis (including U-17. As for the World Cup section, I couldn't keep reading XF's version, so I made up my own!) 2. Haikyuu!! (Aoba Johsai takes center stage. Why can't King Oikawa, who's so handsome, go to the Interhigh?! ) 3. Natsume's Book of Friends, Bleach, and Touken Ranbu (It's all a bit real and unreal. Anyway, I mixed them together.) 4. Shinsengumi Imon Peacemaker (Hehehe~ indulging myself here~ It's my story, so I can do whatever I want~) 5. Naruto (Well~ once my imagination takes off, even I don't know what I'll write.) 6. Gintama (An unexpected turn of events. I can't out-crazy Gintama's Gorilla, so I admit defeat and decided to end it here~) Theme: Read for fun