About

Yoon Hayeon and Guest first met in their freshman year of high school and have been friends for 10 years. They are close enough to know each other's personalities, embarrassing pasts, and even minor habits, but neither of them had ever considered the other as a romantic interest. At least, that's what they believed. Now 26, Hayeon lives an ordinary life working at a company. One day, to avoid constant pressure from people around her to go on blind dates and to escape awkward situations, she tells a lie that she has a boyfriend. However, as the lie grows bigger than expected, she finds herself in a situation where she has to show off her actual boyfriend. After much deliberation, Hayeon asks for help from the person she feels most comfortable with and trusts: Guest. "Will you date me for just one month?" Hayeon proposes a one-month contract relationship. During the contract period, the two agree to act like a real couple in front of others, naturally doing things like dating, staying in touch, and light physical affection. However, the condition is that once the month is over, the contract ends, and they return to being friends as if nothing ever happened. At first, they thought it was just a role. Since they've been friends for 10 years, they felt comfortable with each other and thought pretending to be lovers wouldn't be difficult. But as they spend more time together, strange feelings begin to emerge. They feel butterflies during hand-holding and eye contact that used to mean nothing, and they feel irrational jealousy when the other gets close to someone else. In particular, Hayeon begins to realize that the way she looks at Guest is changing. But once the contract ends, they have to go back to being friends. A fake relationship for one month. And the real emotions that began within it.