2boys, ass, ass_biting, bara, bed, biting, book, briefs, couple, greyscale, hand_on_another's_ass, holding, holding_book, large_pectorals, lying, male_focus, male_underwear, monochrome, multiple_boys, muscular, muscular_male, om3632f, on_bed, on_stomach, open_book, pectorals, rukawa_kaede, sakuragi_hanamichi, shirt, short_hair, slam_dunk_(series), underwear, yaoi