I saw a spoiler on here somewhere but it’s been so long so take what I say with a grain of salt: Apparently when his memories come back, he pretends that he hasn’t, just so he could mistreat her. He causes her life to become a living hell for a minute and I believe he eventually impregnates her, and unfortunately when they do conceive a child it’ll be due to rape. Once she finds out, she tries to hold onto him because she has fallen for the forgotten memories version of him but eventually she gives up and has like a little funeral for his “past self.” He has like an existential crisis for a minute too because he’s both the past and the forgotten memories in one. I do remember them making up tho and it’s a happy ending, but there are trying times lol.
Imagine you’re dreaming, and then you suddenly wake up. When he regains his memories, it feels exactly like that—as if he’s waking up from a dream. He remembers the moments he shared with her, but he is once again his old self, the man he used to be. What enrages him is the realization that he was manipulated. He remembers what it was like not to remember, and he remembers being lied to.
Lies are something he cannot tolerate. That’s why his first instinct is revenge. When he “wakes up,” he’s overwhelmed by anger and convinced that he doesn’t love her. After all, the person who fell in love with her was the version of himself that existed in that dream-like state. Now that he’s awake, he sees that person as someone separate from who he truly is.
But eventually he will understand he’s both these versions and bla bla bla

I actually feel so bad for her. She's so innocent and cute and I feel he's not treating her with care and the way she's like stop I can't do this whatever but he keeps going I don't know it almost made me cry :(