1girl, ass, black_shirt, blue_archive, blue_buruma, blush, bottle, buruma, from_behind, gym_shirt, gym_uniform, halo, holding, holding_bottle, kneepits, long_hair, looking_at_viewer, looking_back, morikawasansei, official_alternate_costume, outdoors, robot, shirt, short_sleeves, smile, solo, star_sticker, sticker, sweat, thighs, towel, wet, yuuka_(blue_archive), yuuka_(track)_(blue_archive)