2boys, bad_pixiv_id, bara, blush, couple, drooling, eye_contact, from_side, greyscale_with_colored_background, half-closed_eyes, imminent_kiss, kekkai_sensen, klaus_von_reinhertz, large_pectorals, leonardo_watch, long_sideburns, looking_at_another, male_focus, mature_male, multiple_boys, muscular, muscular_male, mutton_chops, nore_(boosuke), nude, pectorals, red_hair, short_hair, sideburns, tusks, yaoi