1; Sigh

A story about Kim Sejeong. She was suffering from knee cancer which made all her works useless. Her parents worked their ass off to pay her treatment.

Until one day, a guy named Kim Taehyung came into her life. He made her happy, put her into happiness again. Accepted her for who she was.

But something happened, he had to leave her. She was dumbfounded. She thought her love was just a play for him.