1girl, artist_name, barefoot, bed_sheet, black_eyes, black_hair, bob_cut, breasts, camisole, camisole_lift, closed_mouth, collarbone, dated, futon, girls_und_panzer, hair_between_eyes, hand_up, knees_together_feet_apart, legs, light_smile, looking_at_viewer, lying, matsui_yasutsugu, midriff, navel, on_back, on_bed, panties, pink_camisole, pink_nails, pink_panties, short_hair, signature, small_breasts, smile, solo, tatami, toenails, toes, underwear, underwear_only, upside-down, utsugi_yuuki