My Amnesia Girl (2010)

When Apollo finds himself surrounded by friends who are beginning to settle down, he is faced with the possibility of finding his true love. It all boils down to one name: Irene. It must be fate then, when he once again sees Irene, his ex-girlfriend from three years ago with whom he had the best memories with. Apollo and Irene were a perfect couple until circumstances led them to fall apart.Now, Irene has no recollection of Apollo, having acquired amnesia shortly after their separation. Apollo sees this as the perfect opportunity to pursue Irene again, and be able to undo all the mistakes he made in the past, by offering Irene the best memories she could ever have.True love is difficult to resist, they learn. Just when they find themselves ready to commit to each other, the pains from the past catch up with them, challenging them to finally own up to the mistakes made and lies said, and eventually realize what it is to forgive and forget.

Source: TMDb