I had to turn off the volume here and there from episode 10 as the background music is so loud you cannot hear the dialogue.

I still am patiently watching since it's a good story and the main leads are a good looking couple.

He lost his memory 5 years ago then met his girlfriend not remembering that she was his girlfriend, he fell in B love with her again.

She knew all his likes and dislikes and was suspicious that he must have known her before he lost his memories .