I do like this VN but I am feeling a bit frustrated with the story. It feels like two different stories that have been mashed into one.
We have the MC being tortured in hell for centuries, he unlocks a hidden power, gets free and takes revenge. He's angry, he feels betrayed, his mind and body are deeply scarred, etc. I don't know why he would be trusting anyone honestly, but everything that happens in Hell is great.
And then he's on Earth, and he runs into angels that he was close to centuries ago, and whom (as far as he knows at this point) ignored all of his prayers and didn't lift a finger to rescue him from hell, and just, nothing? There's no real emotion from him at this point. There's no anger, no 300 or so years of bottled emotions from the MC. The "demon" options at best just makes him apathetic and standoffish. And the others - Emma, Raphael, Azel, there's barely any emotion from them either. There's no real show of sympathy for their friend that has been tortured for actual centuries. He also just ripped hell a new asshole. The MC could quite reasonably be nothing like the person they remember. Nobody is hesitant on how they should act around him or what they should say to him.
It feels as though there has been an abrupt change in the tone and direction of this VN at around the point where the MC joins Emma and the girls. The first half of the story is too dark for the second half. This feels like two story concepts merged into one, and to be honest I'd play both of the stories, but they're not fitting together too well at this point.