1girl black_hair bracelet dolphin_shorts flat_chest gokou_ruri highres jewelry long_hair midriff mole mole_under_eye ore_no_imouto_ga_konna_ni_kawaii_wake_ga_nai purple_eyes purple_shorts purple_sports_bra shorts simple_background solo sports_bra standing takatsuki_akira towel white_background zipper zipper_pull_tab