2boys, animal_ears, bad_pixiv_id, bara, blush, closed_eyes, clothed_male_nude_male, couple, dog_ears, flustered, from_side, glasses, kekkai_sensen, kemonomimi_mode, klaus_von_reinhertz, leonardo_watch, licking, licking_another's_cheek, licking_another's_face, long_sideburns, male_focus, mature_male, multiple_boys, muscular, muscular_male, mutton_chops, nore_(boosuke), nude, red_hair, semi-rimless_eyewear, shirt_tug, short_hair, sideburns, spot_color, tusks, wavy_mouth, yaoi