If I were him I would be mad as hell. Like wtf world/god, Imagine struggling for 10 years because of a skill that make every monsters lust after you, and after finally maxing your skill a random dude take all of your exp/level?????
The way I would change the genre from romance to murder/mystery so quickly….
I appreciate the author for not showing the rape scene and implying it. Usually in revenge or horror manga , the author depicted them so visually that it feels like they do it to draw porn with an excuse.