I Suffered a Broken Heart and Became a Nerfing Character

I, a D-level talented couple. However, my girlfriend suddenly reawakened and miraculously became S-rank. As soon as we met, I tried to congratulate her, but then she suddenly dumped me.

After being broken up by her girlfriend and some kind of incident occurred the next day, my status window appeared, and from that status window, I gained the ability to ‘nerf’ other people’s abilities.

(It is a hunter story where the main character belongs to the villain.)