cai geng, satake minako, idolmaster, idolmaster million live!, commentary request, highres, 1girl, :d, ass, back, backboob, beach, beach towel, beach umbrella, bikini, bikini bottom only, black bikini, black bow, blue eyes, blue sky, blush, bow, breast press, breasts, brown hair, cloud, cum, day, hair between eyes, hair bow, large breasts, long hair, looking at viewer, looking back, lotion, lying, ocean, on stomach, open mouth, outdoors, partially visible vulva, ponytail, projectile cum, sidelocks, sky, smile, solo, sunscreen, swimsuit, topless female, towel, umbrella