'I remember that boy that I fell in love with 10 years ago.' Kim TaeYeon 

'I have never forgotten about you since the day I saw you,' Kwon JiYong 

2 Idols were lovers in the past, but even they themselves do not remember who the other party is. 

Fate decided to separate them when they were young but brought them back together into the entertainment industry 10 years later. 

A memorable and unforgettable childhood that lead to something more in their adult life. 

However, is their adult life going to be as simple as it is? 

What happens when one becomes an undercover and does life threatening missions?

Are they able to be together like they hope for? 

Characters: 

BigBang GDragon 

SNSD's TaeYeon