Sang-ho, a student who is not interested in studying and wants to take over his father's company and live comfortably, starts tutoring because of his father's anger. Sang-ho, who had little expectations, gradually falls into the secret class of his sexy tutor Hyeon-jeong. And a few days later, a younger, sexier tutor appears...

• Kim Ji-ah
• Han Seok-bong
• So Jeong
• Kang Min-woo