3girls, arm_support, bikini, bikini_under_clothes, blue_bikini, blush, breasts, brown_hair, cleavage, collarbone, cutoffs, denim, denim_shorts, dolphin_shorts, fangs, hair_intakes, half-closed_eyes, himekawa_yuki, hino_akane_(idolmaster), idolmaster, idolmaster_cinderella_girls, long_hair, looking_at_viewer, medium_breasts, multiple_girls, navel, open_fly, orange_bikini, orange_hair, ponytail, red_bikini, see-through, see-through_shirt, shirt, short_shorts, shorts, simple_background, sitting, smile, straight_hair, striped, striped_bikini, swimsuit, tied_shirt, trente, twitter_username, very_long_hair, wakabayashi_tomoka, white_background