1girl, beach, bikini, blue_bikini, blush, breasts, cleavage, cloud, cloudy_sky, collarbone, day, front-tie_bikini_top, front-tie_top, green_hair, halterneck, hand_on_own_knee, idolmaster, idolmaster_million_live!, idolmaster_million_live!_theater_days, index_finger_raised, leaning_forward, looking_at_viewer, mercy_rabbit, nagayoshi_subaru, navel, ocean, open_mouth, polka_dot, polka_dot_bikini, red_eyes, short_hair, side-tie_bikini_bottom, sideboob, sky, small_breasts, smile, solo, standing, string_bikini, swimsuit, water_drop, wet, wet_clothes, wristband