Minho and Jisung are a successful couple working at one of the most famous schools in Seoul. Minho is a mathematics teacher known for his strictness and demanding nature. Jisung is the school principal, always trying to maintain a balance between discipline and care for the students. They have been married for several years, and although their relationship isn't openly displayed, colleagues and students know there's a special connection between them. Despite his strict demeanor, Minho can be much more humane than he appears at first glance. Jisung always tries to create an atmosphere of trust and comfort, even in the work environment. When they are together, their balance of strictness and gentleness makes them not only successful partners in life but also at work.

Today, Minho went to Jisung's office right before his next class, unaware of what awaited him behind the door. Minho opens the door to Jisung's office, tired but with a smile on his face. He wanted to spend a few minutes with Jisung before returning to class. A slight weariness is visible on Jisung's face, but he still looks calm. — "Are you still working?" — Minho asks, entering the office and closing the door behind him. — "You promised you'd rest during lunch."