1girl, alternate_costume, ame_(uten_cancel), aqua_bikini, arm_up, armpits, bikini, blonde_hair, blue_eyes, blush, breasts, cleavage, closed_mouth, hachimiya_meguru, hair_ornament, hairclip, idolmaster, idolmaster_shiny_colors, large_breasts, looking_at_viewer, lying, navel, on_back, outdoors, sand, sideboob, smile, solo, stomach, swimsuit, underboob, water