Death Note 17+18

Chapter 17: When you give up the Death Note you don't forget the entire time lapse you had it, you just forget every thing you did, feeling you had, PERSONALITY CHANGES YOU SUFFERED, related to the Death Note. So they both remember dating and the investigation and all that, but they don't remember the conditions in which they met, she doesn't remember what she wore (she was in disguise) or how she knew his name before he told her (She knew because she had the shinigami eyes and could see his name by herself) but those are Death Note's related things, so she has no recollection of them, but she does recall meeting Light that day, falling in love with him, dating him. He also remembers the same. Regarding the moral code. Light always had one, even when he found the Death Note at the beginning, remember how he wanted to clear the world of bad people, it took a while for him to start changing, and getting distorted and greedy and proud, starting to deviate from his "normal self", That's because of the L challenge and the power of the Death Note, he started becoming manipulative and bad all around, but his true self when we first met him was a good kid that studied a lot and had a strong moral code. That is why in my previous comment (On your previous episodes) I told you this would be Light before even finding the Death Note, cause moral wise and even attitude wise, all the changes his personality suffered BECAUSE of the Death Note power and the things he had or wanted to do while having it ARE GONE when he decided to give up the Death Note, so besides all the Death Note's related MEMORIES, all the personality and attitude changes related with it are gone as well. That is why L says "Looks like Light had a personality change" and he seems surprised when Light said he couldn't toy with Misa's heart. Just like you, L doesn't understand, cause he met Light when Light's personality was already kinda fu*ed up.