1girl, amochin, arisugawa_natsuha, bare_shoulders, bikini, breasts, brown_eyes, closed_mouth, cowboy_shot, criss-cross_halter, eyewear_on_head, halterneck, hand_up, idolmaster, idolmaster_shiny_colors, large_breasts, long_hair, looking_at_viewer, multi-strapped_bikini, navel, o-ring, o-ring_bikini, ocean, off_shoulder, open_clothes, open_shirt, orange_hair, see-through, see-through_shirt, smile, solo, stomach, swimsuit, water, white_bikini