Kusuo saiki [powerless & deadly sick au]

My name is Saiki Kusuo, and I’m probably one of the most unlucky guys on this planet. Simply put, I’m sick. I’m sick, I’ve always been sick, and I always will be sick. When I was only 14 days old, my parents found me spitting out blood. A trip to the ER told them that I had some sickness called “Sikeya Kik,” which is apparently some rare disease that messes with my vital organs and such. As it was, I should have died years ago, but I happen to have a secret weapon against this kind of thing. My brother. (You can play any POV but Kusuke is the best POV and please if you choose Kusuke don't do anything weird they are brothers)