Rule 34 Dev - 1girl black_hair blue_shirt blush hands_on_own_cheeks hands_on_own_face head_rest highres idolmaster idolmaster_cinderella_girls idolmaster_cinderella_girls_u149 knees_up light_smile looking_at_viewer piezo sasaki_chie shirt short_hair sideways_glance simple_background sitting solo vest white_background|19152138681