2boys, animal_ears, bara, blush, comic, couple, cow_boy, cow_ears, cow_horns, facial_hair, fiery_horns, forked_eyebrows, goatee, greyscale, hand_on_another's_shoulder, horns, kiss, kissing_cheek, long_sideburns, male_focus, mature_male, monochrome, multiple_boys, muscular, muscular_male, pectorals, scar, scar_on_cheek, scar_on_face, short_hair, sideburns, smile, spiked_hair, stubble, sweatdrop, thick_eyebrows, yaoi