1girl ass black_hair black_shirt black_socks blue_archive blue_buruma blue_eyes bottle breasts buruma from_behind gym_uniform halo highres jacket long_hair looking_back no_shoes off_shoulder ponytail shirt short_sleeves sitting smile socks solo star_sticker sticker_on_face thighs track_jacket ushiki_yoshitaka water_bottle yuuka_(blue_archive) yuuka_(gym_uniform)_(blue_archive)