yokota mamoru, shimamoto kazuko, ryouki no ori, game cg, 00s, 1girl, alternate hairstyle, arm behind head, arm support, arm up, armpits, bath, bathing, bathroom, bathtub, black-framed eyewear, blue hair, breasts, breasts apart, brown eyes, bubble, bubble bath, collarbone, faucet, female focus, foam, glasses, grin, hair down, indoors, knee up, large breasts, long hair, looking at viewer, nipples, partially submerged, puffy nipples, sitting, smile, soap bubbles, solo