[Demon Slayer] I Am the Sun!

"In this wretched, polluted world, how ridiculous it is to see people struggling in such ugly ways." He sneered as he wiped his blade. "Heh, you bug, just let me... Pfft! You idiot! Keep hitting my head and I'll beat you up!" Kazehaya Shuichi is a lonely swordsman who believes there's no kindred spirit left in the world. His dream is to bring light to this dark, dark world. "Dawn will come again." "Call me an idiot one more time and I'll really hit you!" # Maybe, possibly, sort of a little chuuni # A sudden burst of inspiration, and I haven't even figured out the protagonist's name # The CP should be the big brother Premise: I am the sun!