Yukina, an office worker who suffers from constipation, casually participates in a training camp for constipation that she learned about on the Internet. However, it turned out to be an enema anal torture exercise class run by a perverted SM trainer. In order to improve constipation, you have to train the muscles around the anus and the anal muscles. Expansion, foreign body enema, anal sex, merciless torture of a female trainer. The anus is relentlessly humiliated and teased.
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