Sujeong Cho begins to struggle with in herself, as her boyfriend 19th birthday comes. She believes that all of the Noonas will steal him away, since he legal.  Niel begins to face trouble as his first love returns

After getting hit by a car, Lee Sungyeol wakes to find himself in a mysterious place, that leads him to places from his past. Where he meets the familiar Kim Myungsoo. The truth which connected the people together finally surface. The void of missing someone will be filled temporary?