Well, I had high expectations and I actually enjoyed this series for the most part.
The thing is they made it so simple, yet so bland, I can't even wrap my head around it.

Story: the reasoning behind the concept is interesting! A woman lose her memories about the previous 3 months; she finds out she has completely changed in comparison to what she remembers of herself, personality and outside appearances wise. Everything has changed: from her body to her style and even her apartment is different.
Now she's got an ex-boyfriend/roommate which she knows NOTHING about. Also, the woman has a special friendship with another man (they are childhood friends).

It's a simple triangle story, okay? I don't need to post any spoiler about this, except it's not an actual triangle and even though you're wishing for an happy ending, the last episode is kinda dull.

Acting: first, I love Otani Ryohei ? he can be a tree in the next drama, I'd still love him. The lead actress isn't so bad, but she's a tad annoying, and Yuki, well... i can't hate him, but he's always the same character! I'm kind of tired of this rigid, straight-faced, fish eyed man he has to be in every single drama/movie.
This time around I saw some smiles here and there, but really... I can't feel a thing coming from him. Maybe it's a cultural barrier, but honestly... I watch pretty much ONLY asian dramas and I feel nothing when he acts. I don't hate him, I swear. I wish he was more soulful.

I feel bad to say this was not worthy of my time, since I enjoyed it and didn't drop it, but the ending is so predictable, dull, boring and this ruins pretty much everything. Even though it's not a masterpiece to begin with, it's still a decent drama if you're looking for some romance to pass the time.