1boy, abs, arms_up, briefs, closed_eyes, closed_mouth, forked_eyebrows, kimetsu_no_yaiba, male_focus, male_underwear, marotoskin, multicolored_hair, muscular, muscular_male, navel, nipples, orange_hair, red_hair, rengoku_kyoujurou, shirt, solo, topless_male, underwear, waking_up