1girl, ;d, amami_haruka, armpits, bikini, black_bikini, blush, breasts, brown_hair, cleavage, collarbone, day, front-tie_bikini_top, front-tie_top, hair_ribbon, hitotsuki_nanoka, idolmaster, idolmaster_(classic), idolmaster_million_live!, large_breasts, looking_at_viewer, one_eye_closed, outdoors, ribbon, smile, solo, splashing, swimsuit, teeth, upper_body, upper_teeth_only, w