itou ryuusei, sanbi, original, 1girl, backpack, bag, bare shoulders, black eyes, black hair, black thighhighs, blunt bangs, bob cut, breasts, closed mouth, collarbone, covered navel, dot nose, female focus, half-closed eyes, looking at viewer, one-piece swimsuit, pink bag, randoseru, school swimsuit, shiny skin, short hair, sitting, sitting on object, skindentation, small breasts, solo, swimsuit, thighhighs