Sung Hae Sung (Yeo Jin Goo, Circle: Two Worlds Connected) is a cheery high school student. Being the eldest sibling, he wants to provide for his family instead of going to college. On the day of his 19th birthday, he gets into a car accident and passes out. He wakes up on the top of his school building. He thinks he survived and everything is normal. Except everyone thinks he died 12 years ago, and he hasn't aged at all. Jung Jung Won (Lee Yeon Hee, The Package) is Hae Sung's best friend. She was the one who took him to the place where he had his accident. Distraught, she has been unable to move on from the incident since. Having failed to pursue her dreams under the stress, she works as a kitchen assistant at a nice restaurant. Cha Min Joon (Ahn Jae Hyun, Cinderella and Four Knights) is the owner of the restaurant where Jung Won works. He has feelings for her. However, she has never shown any interest in him. In her mind, she can't be with anyone while carrying Hae Sung in her ... 重逢世界-最美不过初恋。呐，如果死去的恋人出现在你面前……。这个夏天让我眼前一亮的韩剧呀。无语。男主为什么死？死了又为啥成了凶手？。请让我，再见你一次。这评分是不是给的低了 不平则鸣。一个幸福的世界。一拖显百丑。现在吧，就现在。。 该剧讲述了18岁少年和与自己“同年出生”31岁青梅竹马女人间的奇幻浪漫爱情故事。 原本青梅竹马的男女主人公在高中的时候因为特殊原因而分开，女主角一直以为男主角已经去世，但是13年之后女主角又再次遇到了男主角，男主角仍然是当年18岁的模样，而此时的女主角已经31岁了，但是两人 心中依然有着彼此，于是一段特殊的爱情就这样开始了。
