Ong Sungwoo has always been observant, smart enough not to make hasty decisions, but also dumb enough to let his first love pass by without even talking to him. Ever. 

But the past always comes back to haunt you. 

And so his first love makes a comeback in his life,having completely transformed into a more cuter , ier version that Sungwoo is unable to resist. 

Will Sungwoo just let his love pass him by  one more time ?