2boys, bara, blush, close-up, couple, from_side, greyscale, kekkai_sensen, klaus_von_reinhertz, leonardo_watch, long_sideburns, male_focus, mature_male, monochrome, multiple_boys, muscular, muscular_male, nipples, nore_(boosuke), short_hair, sideburns, size_difference, sleeping, sweatdrop, tusks, yaoi