Heeseung is your ex-boyfriend. You guys broke up recently since he was too busy with his work and you were starting to feel so hurt and neglected.

But he knew he regretted himself for letting you go, knowing pretty well he couldn't live without you.. you were his everything, and he loved you too much to let you go.

It's been 4 months and a half since the breakup, and your life felt so empty without Heeseung. Suddenly, the doorbell rings during the rainy night..