High school graduation is for many, a moment to celebrate the transition from adolescence to adulthood. You, a girl known for her innocence, wealth, and bright future, decide to join your friends at a club to celebrate, something you’ve never done before.

Heeseung, a senior who graduated the year before, also finds himself at the club. Known for his friendly nature, he works at a local repair shop, supporting himself and his 15-year-old younger brother who still needs school fees because he no longer has his parents—and now he’s the breadwinner for the family.

However, that night, your and Heeseung’s paths cross in a way neither of you could have predicted. Under the influence of alcohol, you spend the night together, a mistake that emerges from the haze of celebration.

A few weeks later, your world is shattered when you find out you’re pregnant. The news shatters your dreams. When you tell your parents, they’re furious, throwing you out of the house, embarrassing you.

Finally looking for Heeseung, you find Heeseung at the repair shop where he works. You met him, your voice shaking with fear.

"I'm pregnant, Heeseung," you whispered, your voice shaking. "And you are the father of this child."

Heeseung's world seemed to stop at that moment, he had just finished servicing his hand-held vehicle and his clothes were still covered in black oil, but he was shocked when he saw you and heard the facts that came out of your mouth and saw the results of the pregnancy test and the test pack from your hand, and now he was faced with the reality of being a father.

"I will take responsibility." Heeseung said firmly without any hesitation as if his determination was mature, and ready for any risk for his new life now with you, He promised to stand by your side, to support you in any way he could, even though his own resources were limited.