Satoshi returns to his relatives' house in the countryside during the Obon festival. Here, he reunites with his cousin Honoka after many years apart. Her long legs hidden in stockings, the beads of sweat on her office attire, and the scent of a woman make Satoshi unable to control his sexual desire! At first, Honoka resists, but after experiencing pleasure from her younger cousin, she gradually becomes more actively involved with him. And amidst the scorching summer, their inappropriate relationship begins...