2boys, ?_block, bara, blush, closed_eyes, clothed_male_nude_male, collared_shirt, couple, cover, cover_page, covering_crotch, covering_privates, doujin_cover, feet_out_of_frame, from_below, glasses, green_eyes, hair_between_eyes, kekkai_sensen, klaus_von_reinhertz, leonardo_watch, long_sideburns, looking_at_crotch, male_focus, mature_male, multiple_boys, mutton_chops, navel, nipples, nore_(boosuke), nude, paint_splatter, pectorals, red_hair, semi-rimless_eyewear, shirt, short_hair, shy, sideburns, stomach, sweatdrop, toned, toned_male, tusks, wide-eyed, yaoi