1girl, o, arched_back, arm_behind_back, ass, black_shirt, blue_archive, blue_buruma, blue_eyes, blue_hair, blush, breasts, buruma, cellphone, cowboy_shot, doufu_(pixiv9093484), from_behind, from_side, gym_uniform, halo, holding, holding_phone, holding_stopwatch, long_hair, looking_at_viewer, looking_back, medium_breasts, official_alternate_costume, parted_bangs, parted_lips, phone, ponytail, shirt, short_sleeves, simple_background, smartphone, solo, standing, star_sticker, sticker_on_face, stopwatch, t-shirt, thighs, white_background, yuuka_(blue_archive), yuuka_(track)_(blue_archive)