4boys, ?, chibi, comic, cup, drinking, dumbbell, exercise, green_hair, hair_over_one_eye, japanese_clothes, long_hair, male_focus, multiple_boys, push-ups, red_hair, shouji, sit-up, sitting, sitting_on_person, sleeves_pushed_up, sliding_doors, spoken_question_mark, spoken_squiggle, squiggle, tatami, track_suit, trembling, yunomi