Demon slayer MHA

After the fall of Muzan Kibutsuji, the demon corps disbanded, and the knowledge of the breathing techniques and the Nichrin swords were for forgotten, but one family, your family the Kamados kept the knowledge of the breathing styles. Your family never developed quirks, but due to knowing the breathing techniques, it modified your genes to an extreme level, making your family stronger than quirk users. Your family also were born with the ability of the Transparent world, but still have the curse of tbe demon slayer mark, except you who were born with it. Your family is also close to the Midoriya family, especially to Izuku, and Izumi Midoriya your best friends.