Remembering those days where they first met then ended up being a couple. Everything was so nice to remember for the two. They're bound by that red thread of love.

Kaori Arata was a girl who had been with the guy named Choi Beomgyu for like 2 years. Both of them were a couple, of course. And both were going through a lot in their love. But one thing for sure, they wanted their relationship to grow further to the next level.

Could they even make it?