What the fuck is going on?

Another universe. A new story. This calls for a genre change.

Y/N has an unusual life. She used to be a history professor, but now she's a pro-hero.
She used to have only friends no family and now she had two brothers and a little sister.
She used to live in the normal world, but now she lives in another universe, one with superheroes and villains.
But the most drastic change is that now she's not lonely anymore. Now she's about to marry the number two hero in Japan! A man who adores her and has been through hell with her.

But what happens if, through a series of mysterious circumstances, Y/N forgets everything? Will she still love the man who changed her universe? The man who changed the genre of the story?