kouno (masao), orange legwear, bad id, bad pixiv id, 2girls, bath, bathtub, bikini, black choker, breasts, breasts apart, brown hair, bubble, choker, detached sleeves, facing viewer, flat chest, frilled choker, frills, indoors, looking at viewer, medium breasts, micro bikini, multiple girls, one-piece swimsuit, orange bikini, orange choker, same-sex bathing, school swimsuit, shared bathing, short hair, siblings, single thighhigh, sisters, skindentation, smile, soap, soap bubbles, standing, swimsuit, thighhighs, tile wall, tiles, twins, wading, wrist cuffs