our living heart. (Completed)

Jeon Jeongguk, a famous Basketball player. Young and rich. With an adorable son. He thinks he is quite content with life even if he is a single parent. He wasn't quiet prepared to meet his ex-fiance, Kim Taehyung who also happens to be his son's kindergarten teacher.
The couple broke their engagement because of misunderstandings and Jeongguk never really get over him. They were together for seven years.
His heart break, when he saw the ring on Taehyung's middle finger.