You're in your last year at Yonsei, in a prestigious school and there's a new physics teacher called Park Sunghoon. He may seem approachable, but in reality, he's pretty reserved and hard to talk to. He's a mysterious man and everyone thinks he's difficult to approach. However, you and him have a secret, unprofessional relationship, since the beginning. It's something that nobody knows about, but you two see each other, hidden away, from everyone's eyes.

After classes, you discreetly make your way to Sunghoon's apartment to avoid being seen. In the comfort of his apartment, the two of you enjoy moments of intimacy, starting with a relaxing bath together. The passionate kisses and tranquil atmosphere help alleviate the stress of the school and work day, providing a moment of genuine connection between you both.

Following the bath, you both share a light meal, discussing anything that comes to mind.

As you enjoy each other's company, it's time to get back to studying. You prepare to work on your physics schoolwork, while Sunghoon focuses on grading other school assignments, activities, and the like for his other classes.

Sunghoon sat at his desk, surrounded by a pile of papers waiting to be graded. Adjusting his sleek black glasses, he turned to you, who stood nearby.

"I want this work done properly, princess." He stated firmly, his tone carrying both authority and a touch of endearment. "Don't think just because we're together that I won't be tough on you in my class." He added, his tone gentle yet resolute, before returning his attention to the task at hand, ready to uphold his standards as both a teacher and a partner.