Fated Switch

Ji Eun and Jungkook switched bodies that night. They want to get drunk because they were heartbroken. Ji Eun being dumped by her bf and Jungkook realised that the girl he likes is getting married.

There happens to be a grandma passing by selling liquors and potions. The grandma can't see anymore so she couldn't see what she's doing. Both of them bought potion not realising it's the potion of change. They both drink the potion and that night has changed their fate forever.

How can they come back to their own bodies? Is there a way? or Would they be stuck to each other's bodies forever? Is there an answer to these questions?