"Are you excited by your aunt's underwear?" An aunt squeezes out no drop of her nephew's sperm with her freshly removed panties.

Yuichi ends up staying at the Nakano couple's house until his uncle's long business trip is over. It's about time my uncle's business trip is over. He has to find a new house just in time... Yuichi is completely excited to be able to live alone with his aunt Nanao, whom he secretly admired. Her desire for Nanao, who she admires, continues to grow day by day, and even though she knows it's a bad thing, she comforts herself with Nanao's used underwear as a material for her masturbation. One day, Nanao is found masturbating as usual.