Chrome was a magician in the hero’s party. He fought the Demon Lord’s army alongside people like Irina, the lover who vowed to marry him in the future, and the hero, Yuno, who was his close friend. They were all close companions. However, that was only in Chrome’s mind. His lover, Irina, became intimate with the hero, Yuno, and Chrome was sacrificed to make the hero stronger. Chrome’s magic powers were snatched away and he was kicked out of the party. Demons surrounded him as he was on the verge of death and he was driven to a corner. At that moment, Chrome awakened to a “darkness” within himself. Amidst his despair, he acquired an unrivaled skill. Now with this skill, he could exact revenge.
It's a basic revenge plot. Add on the Isekai and you get an even more basic plot. The protagonist had a lot of potential, but they made its so the protagonist' whole personality was revenge. That's not a good idea if you want a good story. So in the future it may get better but for now it's borderline average.
This story has an extremly interesting premise, but the execusion is absolutly shit. The main character is a basic edgelord who grows stronger with negative emotions, but despite that he goes around with an annoying FM who's not intersting or compelling in any manner, shape, or form. Not only that, but his ability is just obnoxious. Instead of having an interesting fight with his enemies where he display's hispower in the name of his revenge, he just walks over to them and they instantly die. It's probably one of the least promising revenge stories I've ever seen and while it may be a good power trip and have some nice art, I can't really think of any reason to read it.