1girl :o anastasia_(idolmaster) armpits arms_up blush breasts cleavage cleavage_cutout clothing_cutout covered_navel earrings grey_hair groin highres idolmaster idolmaster_cinderella_girls jewelry large_breasts looking_at_viewer one-piece_swimsuit short_hair simple_background solo stud_earrings swimsuit tomajiyama water_drop white_background