Rule 34 Dev - 1girl alternate_costume black_hair blush breasts cleavage collarbone hands_on_own_chest idolmaster idolmaster_shiny_colors large_breasts long_hair looking_at_viewer mayuzumi_fuyuko navel pdal_(pdalhhh) simple_background solo sports_bra stomach very_long_hair white_background white_sports_bra|19526274027