Jiyoung's best friend has the hiccups and they are home alone at her house. She made various attempt to stop the hiccup but none worked. Well, there is one plan that might save her beloved friend from the hiccups but it may change their friendship into something even stronger, or as awkward strangers again.

Time travel. It's not a joke. From the year 4,000 a group of boys perfected time traveling along with their Matokis. Now that they got their time machine done and finished, it's time to study a little bit of history... History will repeat itself.

Daehyun is dating Jiyoung. Jiyoung thought she knew everything about him but there's a secret that he's been keeping from her. She found her prince but what will happen when she finds out the truth? What is that secret? Will he try to be with her always or go their separate ways because of the secret?

Daehyun is quiet and quite annoyed by people who talks a lot. School's nerd is Eunji and talks a lot. So much differences could love come between these two?