"Everyone has a favorite student but this student is treated in a very special way." Meet Min Yoongi, a college English professor at Seoul Uni for 4 years. Yoongi loves his job and loves teaching but there's another thing that he loves the most, Park Jimin. A year ago, Park Jimin, an innocent young student and is the headmaster of the university son, enroll to school. Yoongi treats his Jimin in very special way that no other teachers do, a week later the two confessed their love to each other. 3 years later, the two are still together and happy but there is problem that might break these two couple apart. Meet Kim Taehyung, a gym teacher in high school. One day in detention, he was chosen to watch over the student but what he didn't know that the one kid that he had a crush on in there, Jeon Jungkook. Jeon Jungkook, another innocent young student and son of Kim Namjoon and Kim Seokjin, who has a crush on the gym teacher on the longest. And that one dentition became special for those two. What will happen for these four couple?