Rule 34 Dev - 2023 2boys anthro ass atlus balls belly big_muscles black_frost_(megami_tensei) bodily_fluids clothing demon demon_humanoid duo erection evil_face extreme_size_difference fangs gay genitals glans hat headgear headwear highres holding_penis humanoid humanoid_genitalia humanoid_on_anthro humanoid_penis imp larger_male male male/male male_only mammal masturbation megami_tensei mostly_nude mouse murid murine musclegut muscular muscular_humanoid muscular_male nude one_eye_closed open_mouth open_smile pecs penile penile_masturbation penis red_background red_eyes red_tongue rodent simple_background size_difference smaller_male smile standing sweat tderek99 teeth text tongue vein veiny_penis yaoi|8289780968