Flasher Cutie Gets Cucked!

Koji Oda and Mayumi Yamamoto have been friends since childhood.

One day, Mayumi challenges Koji to compete with their test scores, believing she can beat him.
Mayumi dares to Koji, "The loser will run around the schoolyard naked!" but she loses!

Koji is used to being told such crazy things by his childhood friend.
However, he's told that the reason he hasn't become more than friends with Mayumi is because of him being too lenient towards her.

To show dominance, Koji calls Mayumi to the park and tells her to get naked.
Mayumi, feeling rebellious, starts actually taking off her clothes.

As she is seen undressing by passing men, she begins to feel sensations other than embarrassment...

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