A sudden call from her boyfriend’s sister, whom she’s only met once: “I missed the last train, can I stay over?” She arrives in a tipsy state, constantly touching him. Unable to refuse, he lets her into his small one-room apartment, but sharing the same bed inevitably leads to something… “It’s cold, can I snuggle up?” A clear sign of temptation! They go at it all night, repeatedly engaging in insatiable sex with her older sister. This is the kind of sex you can’t stop! A masterpiece from the mischievous goddess Jun.