Light 'em up (male reader x demon slayer)

Y/n Uzui: the long lost younger brother of Tengen Uzui. A couple of years after Tengen left to join the demon slayer corps, Y/n finally managed to escape himself and follow in his brothers footsteps. It didn't take long for him to become a demon slayer either, he even created his own breathing style; derived from his older brother. What will happen when Tengen finds out there's another Uzui in the demon slayer corps? What family shenanigans will ensue? And who will Y/n's wives be? Read the book to find out