Made an account just to comment here because this is actually so good omg. I love how there's a female MC option- this might be the only one I've found that I actually like. I'm genuinely so immersed in the storyline, it's really interesting. I also love the siblings, like how their names are similar in meaning and how one is a succubus while the other becomes part of an organization that aims to destroy succubi (unless that changes, I just started playing Ayumu's route). I wonder if there will be a sort of crossover between their stories in future updates, like if the two will ever find out they're on opposite sides. It could be interesting to see them struggle with how to treat each other should they find out. I can't wait to see how the story progresses!