[23.4do (Ichiri)] Summer holidays with my little sister [Vodsky]

Little sister Karin's summer break heats up when an afternoon of fooling around with the garden hose leaves her drenched and squirming in her school swimsuit—right as her big brother walks in on the discovery. His teasing offer to make her feel even better melts into slick, guilty fingering and a nakadashi secret the siblings must keep quiet between homework scoldings and stolen moments. With promises to restrain themselves on Sunday already crumbling and the whole holiday still ahead, this twintailed girl's vacation is shaping up to be anything but boring.