1girl, ass, black_sports_bra, blue_archive, blue_buruma, breasts, buruma, clothes_lift, from_behind, gym_uniform, halo, lanyard, medium_breasts, official_alternate_costume, purple_eyes, shirt_lift, simple_background, solo, sports_bra, sweatdrop, white_background, yn_6262, yuuka_(blue_archive), yuuka_(track)_(blue_archive)