I really enjoyed the series all up to the last arc. It was just too drama heavy to finish the otherwise rather more relaxed story. The memory loss fakeout made it a lot worse since it stole the majority of the last chapter for...absolutely no reason. After all the hardship in the end why not show us the two happy together? A bizarre move.
Personally I would have preferred the two being immortal lovers together but that is just the way these kind of stories always go. Becoming mortal because reasons.