Shota is on his way to visit his cousin Nana, but gets lost along the way. A busty woman calls out to him, and when he turns around, it's Nana, whom he hasn't seen in a long time. Tall and perfectly built with huge breasts—exactly Shota's type—he's overjoyed. Once they arrive at her place, they play doctor, take a bath together, and indulge in various naughty pranks. As their feelings for each other begin to grow, they share an exciting and intimate time.