1girl bag black_hair blush bow bowtie breasts collared_shirt gluteal_fold highres loafers long_hair looking_at_viewer low_twintails medium_breasts mtu_virus multiple_views open_mouth panties pleated_skirt purple_eyes red_bow red_bowtie sakuya_(sister_princess) school_bag school_uniform shimouki_izui shirt shoes sister_princess skirt solo spread_legs standing twintails underwear very_long_hair white_panties white_shirt wind wind_lift