favorite shounen

A story about a boy and his brother and how he's out to protect him no matter what even if he's a s class killer or psycho he'd just want to protect him. Sadly he turned out to be f class and is only a burden on his brother he's unable to handle that and when given a second chance to reverse everything and save his brothers life he does it. Now with this second chance he'll have to raise 50 s classes if he wants to protect his brother and potentially the world.

A guy gets dropped into a horror story, world or is it just a company? It has a great horror vibe and the story is very well told and extremely interesting. His purpose is to get out of ghost stories he is thrown into as fast as possible because he is a coward to horror. He is doing it because he now works for the company and he is trying to get a wish ticket. But question does he really want out? Is there a mystery about are lead? And will he have fun in this new world?