A beautiful Jeongcheol story. Jeonghan as the moon and Seungcheol as the sun. ----- Yoon Jeonghan, a 22-year-old with a sick mother and a father running a convenience store, has only one goal: graduate with top grades and secure a job to pay for his mother's treatment. But when he accidentally bumps into Choi Seungcheol, who lives a life full of sunshine and smiles-everything changes. A sudden, sharp pain shoots through Jeonghan's wrist as they make eye contact, their glowing wrist signs revealing the truth They're soulmates... What happens when two completely different worlds are destined to collide?