1girl, bikini, blonde_hair, blue_bikini, blue_eyes, blush, breasts, cleavage, collarbone, girls_und_panzer, grey_socks, key_(gaigaigai123), large_breasts, looking_at_viewer, navel, open_mouth, shiny_skin, short_hair, socks, solo, swimsuit, youko_(girls_und_panzer)