2boys, bara, between_pectorals, blush, couple, covered_nipples, greyscale, happy, head_between_pecs, head_on_head, head_rest, heart, hug, kekkai_sensen, klaus_von_reinhertz, large_pectorals, leonardo_watch, long_sideburns, male_focus, mature_male, monochrome, multiple_boys, muscular, muscular_male, nore_(boosuke), pectorals, short_hair, sideburns, size_difference, tank_top, tusks, upper_body, yaoi