1girl adjusting_buruma adjusting_clothes ahoge ass blonde_hair buruma from_behind green_eyes gym_uniform highres hosizora_mikoto idolmaster idolmaster_cinderella_girls long_hair looking_back low_twintails open_mouth panties panties_under_buruma panty_peek pink_background red_buruma shirt short_sleeves simple_background solo thighs twintails underwear white_shirt yusa_kozue