1girl, agawa_ryou, arms_up, artist_name, ass, backless_shirt, bare_shoulders, blue_sports_bra, breasts, dated, from_behind, grey_background, hair_tie, halterneck, high_ponytail, long_hair, looking_at_viewer, looking_back, original, pants, red_hair, signature, simple_background, smile, solo, sports_bra, yoga_pants