Rule 34 Dev - 2boys bara big_penis bulge demon_slayer erection erection_under_clothes facial_scar frown fundoshi genya_shinazugawa happy_trail himejima_gyomei kimetsu_no_yaiba kneeling line_art long_hair_male male male_only male_pubic_hair monochrome muscular muscular_male necklace pubic_hair shaved_side spiky_hair teacher_and_student yuufreak|6070878376