makochin, choko, choko (chokotto sister), serikawa chitose, chokotto sister, 00s, 2girls, age difference, black hair, blunt bangs, blush, breasts, breasts apart, brown eyes, fence, flat chest, large breasts, light smile, long hair, looking afar, multiple girls, nipples, no eyewear, onsen, outdoors, partially submerged, puffy nipples, purple eyes, rock, same-sex bathing, shared bathing, shiny skin, short hair, sidelocks, sky, small breasts, smile, steam, sunset, upper body, water, wet