An Amateur virgin fat guy comes to the inn after hearing on a secret website that "two sisters living there will let you have sex with them." When he arrives, he is introduced to two cute sisters, but they start masturbating in front of him... In the open-air bath, the sisters appear and offer him a lewd service. The sisters' father, the manager, then invites him to have sex with them at night, and the entertainment becomes more and more extreme...