Both talk about the life of a kpop group.

Both focus on artists that are trying to pursue a successful career in music. In Persevere, Goo Hae Ra, there's one idol group too.

Both dramas talk about a group of women in their 30's that don't really know how to live or what to do with their lifes. With the help of their friendship they try to move on and even if not always with success they try to be happy in their own way.

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

Both dramas are short and funny love stories. The main boys characters are idols.
And their love stories are very hard and with secrets to keep.