To the people who doesn't seem to understand, here's what I understand of the story so far : when the FL was dying, the ML used some sort of magic to go back in time. So, he saved her and he kept his memory, that's why he's behaving different from what she expected. He said at some point that she isn't supposed to have kept any memory, but for some reason she remember a little. But, I don't think she remember everything.
To the people who doesn't seem to understand, here's what I understand of the story so far : when the FL was dying, the ML used some sort of magic to go back in time. So, he saved her and he kept his memory, that's why he's behaving different from what she expected. He said at some point that she isn't supposed to have kept any memory, but for some reason she remember a little. But, I don't think she remember everything.