zenkou, ayumu (zenkou), chitose (zenkou), original, 2girls, armpits, arms up, blush, breast rest, breasts, brown eyes, brown hair, cleavage, dated, green background, looking afar, looking at viewer, lying, medium breasts, multiple girls, on back, one-piece swimsuit, parted lips, pillow, purple hair, school swimsuit, shiny skin, short hair, simple background, small breasts, smile, socks, swimsuit, tan, twintails