It's okay.
Second chance romance.
It's a bit far fetched and confluted.
They were involved when she was 18 and he was 23.
He was her first.
They broke up, she thinks he broke her heart.
They meet again and he is obsessed with her and she's not interested, only he doesn't remember her.

During separation.
I found this a bit confusing but I hope I got this right.
It's mentioned several times that the Hero has been with a lot of women.
One time he follows the heroine into a room and he realises he's had sex with most of them.
He doesn't do relationships, he's described as a 'playboy'.
He tells his therapist and the heroine at one time, that since he saw her a year ago he hasn't been with anyone else.
He has tried but couldn't get her out of his head.
She mentions at least being with one other man.
No intimate scenes other than the Hero and heroine.
The reason for the loss of memory is okay but after that the way they were broken up for me was a bit OTT.
HEA. ( )