A Millionaire's First Love Movie (Free to Watch)

Sorry guys the last few seconds of the movie went dark.

There are a little girl and a little boy on the stage. The girl says "don't go. please don't go" and the boy says "I have to. But don't worry. I'll come back.. just after 10 days. I promise" and Hyunbin(or jaekyung) asks one of the friends who wrote the drama and It's Eun hwan. I'm guessing that those little girl and boy represents Jaekyung and Eun Hwan when they were little.