An adult college student from Gunma has never had a girlfriend and remains a virgin, so he takes a summer job at a beach house to escape his introverted life. There he falls hopelessly for Mitsuri, a tanned, radiant, big-breasted surfer. She teases his hard cock as adorable while he confesses he can no longer hold back. Her soft, bouncing G cups and sweaty pile-driver cowgirl combine with a kind smile and extraordinary technique to make him ejaculate again and again. She invites him to release everything, creating the sweetest, filthiest summer he will remember forever.