Jeon Wonwoo was a professor on a college in Seuol, South Korea. Everyone was scared of him because of his cold and piercing gaze. His cold, strict, and heartless demeanor. Everyone thought he was a single man, despite being in his late twenties. He's a 29 year old professor, a 182cm tall guy, and has a muscular build with broad shoulders. One of their co- professor, a woman in her mid thirties, tried to flirt and hit on him, despite having the same work, and it was not allowed in school. He just shoved the woman off and ignored her to death until the woman gave up. They didn't know that Wonwoo had a girlfriend, a beautiful woman in her early twenties, a 23 year old girl. She was a cute, beautiful, clingy, spoiled, sensitive, and crybaby. And Wonwoo adored every part of her. That was just not a nobody. She was the only child of a well-known businessman in Korea. And they are foreigners. That girl was a student of the woman who tried to flirt with him. She was his student, under the subject calculus. Wonwoo saw his girlfriend getting hit at the face with a baseball ball, as they were watching with her friends and classmates, including many teachers and of course, Wonwoo, was watching the practice match. His girlfriend's nose was bleeding, and she was on the verge of crying.