2boys, abs, atsushi_kenzaki, bad_twitter_id, bara, biceps, closed_mouth, facial_hair, flexing, gachimuchi_de_dosukebe_na_kateikyoushi_no_oniisan_to_sugosu_natsu, glasses, kaynoob, large_pectorals, male_focus, male_swimwear, multiple_boys, muscular, muscular_male, navel, nipples, pectorals, pose, ryota_hibiki, short_hair, smile, topless_male