1girl antenna_hair ass bent_over black_hair blush breasts commentary_request from_behind full-face_blush fundoshi gloves grimace hand_on_own_hip highres idolmaster idolmaster_(classic) japanese_clothes kikuchi_makoto kneehighs kneepits looking_at_viewer looking_back nipple_slip nipples no_bra no_pants partially_visible_vulva purple_eyes sailor_fundoshi school_uniform serafuku short_sleeves simple_background small_breasts socks solo tengu_(tetuo_kun) wedgie white_background