4girls, ahoge, armlet, ass, back, bare_arms, bare_legs, bare_shoulders, beach, bikini, blonde_hair, blue_eyes, blue_sky, blush, bracelet, breasts, brown_eyes, brown_hair, butt_crack, choker, cleavage, cloud, day, flower, frilled_bikini, frills, hachimiya_meguru, hair_flower, hair_ornament, hairband, hairclip, hat, hibiscus, highleg, highleg_bikini, highleg_swimsuit, idolmaster, idolmaster_million_live!, idolmaster_million_live!_theater_days, idolmaster_shiny_colors, jewelry, large_breasts, long_hair, looking_at_viewer, low_twintails, medium_breasts, multi-strapped_bikini, multiple_girls, navel, nikaidou_chizuru, o-ring, o-ring_bikini, ocean, one_eye_closed, open_mouth, outdoors, palm_tree, run_p_(aveton), sand, shinomiya_karen, side-tie_bikini_bottom, sideboob, sky, smile, standing, string_bikini, striped, striped_bikini, sun_hat, swimsuit, tanaka_kotoha, tree, twintails, water