Won Hana, who has had a crush on baseball player Kim Jin-Hwon for over 10 years. After fanning him, he decided to become a power analyst for the baseball team. But one day, Jin-Hwon Kim, the best pitcher in the major leagues, suddenly returns to Korea and declares that he will play in the domestic league for one year. Even in the Black Hawks team, which has one! As a fan, the news is like a thunderbolt, but one thing is excited at the thought of seeing Kim Jin-Hwon right in front of you. However, Jin-Hwon does not recognize Hana, his high school classmate, and coldly rejects her confession. There was even a real reason for Jin-Hwon to give up his overseas career and return to Korea!! Feeling disappointed and betrayed by her, Hana decides to end her old crush and uses Jin-Hwon’s weakness as an excuse to ask him for contract sex with her. Like that, she believed that after having sex 10 times, she would be able to cut off all lingering feelings… . Contrary to the rumors that he is promiscuous, Jin-Hwon, who usually has mysophobia, becomes obsessed with only Hana after sex with Hana and feels possessive!