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Dae Ho, who became an orphan at the age of 13, was adopted by his father's friend. However, Dae Ho in adulthood knew nothing about the relationship between men and women. Aunt and sisters decided to give pure Dae Ho a secret class
Siblings who are always fighting when they meet face to face. They both thought, "I don't like it at all!" The two, who couldn't go back once they realized that they might actually like each other's "body"...!?