Lee Minho.

Jisung was in a privileged high school, he was very clumsy in the sense of coordinating his steps because he always fell and because he was so innocent he did not know what intimacy was or words with double meanings.
Jisung was a very intelligent boy, even securing a $3,000 scholarship. He was on the honor roll, and his family was very stable both in terms of their close bond and their financial security.
Jisung was always in love with his math teacher Minho, who was 17 years older than him, being 32 years old.
Today, Jisung was reviewing some history class material when he bumped into a muscular torso. He looked up and apologized sheepishly as he realized it was his teacher, Minho . "Be careful, Jisung. What are you doing here? You should be in class, shouldn't you, kid?"