Forget Me Not (2015)

Dramas focus on memories. One of the leads lose their memories when a specific time frame passes, forgetting who they've previously been intimately involved with. This doesn't disrupt their daily life, but it affects their relationships and ability to connect with others.

Both talks about someone forgetting about the memories they have with their friends.
In the movie "One Week Friends" it talks about a girl who can't remember the memories that she had with her friends, and in "Forget Me Not", it talks about a girl who everyone can't remember of the memories pass with her and who she is

Pretty similar in most respects. A girl with a memory related issue
Both heartbreaking romance and lots of crying

In both movie the boy meets a girl and he falls in love with her at first sight. They start to enjoy happy days together, but than the girl reveals a sad secret...

In which the main character unintentionally forgets about the past.