1girl, armpits, arms_behind_head, bikini, blush, border, braid, braided_bangs, breasts, brown_eyes, brown_hair, cleavage, closed_mouth, earrings, grey_background, hyodo_rena, idolmaster, idolmaster_cinderella_girls, idolmaster_cinderella_girls_starlight_stage, jewelry, large_breasts, looking_at_viewer, navel, o-ring, o-ring_bikini, onao, outside_border, ponytail, red_bikini, short_hair, sideboob, simple_background, smile, solo, standing, string_bikini, swimsuit, thong_bikini, underboob, white_border