1girl, ahoge, blue_one-piece_swimsuit, breasts, brown_eyes, brown_hair, collarbone, competition_swimsuit, double_v, eyelashes, flipped_hair, goggles, higeyagi, idolmaster, idolmaster_cinderella_girls, idolmaster_cinderella_girls_starlight_stage, in_water, looking_at_viewer, medium_breasts, nishijima_kai, one-piece_swimsuit, one_eye_closed, open_mouth, pool, short_hair, smile, solo, swim_cap, swimsuit, v