1girl, arms_up, bananafish1111, blue_archive, blue_jacket, blue_shirt, breasts, halo, indoors, jacket, large_breasts, long_hair, lying, official_alternate_costume, on_back, open_mouth, purple_eyes, purple_hair, shirt, solo, sportswear, t-shirt, track_jacket, unworn_jacket, yuuka_(blue_archive), yuuka_(track)_(blue_archive)