Well, I doubt this story will go in that direction, but Succubi and Incubi in folklore are one and the same. They can change gender based off their target.

If we go technical , Succubus is the one that recibes, so if the MC is gay and he is the one that is getting the action is a correct term. But we know is not the case so yes it is totally wrong here

he has a Succubus system, he is not Succubus.

Wym? Can he change a female into a succubus?

inaccurate. succubus have different abilities. incubus go into dreams to impregnate women while succubus cannot

No, both could go into dreams. In fact, they looked hideous in reality and wouldn't attract anyone. It was attracting people in their dreams that they got people to sleep with them. And like I said, they where the same creature - they could swap their gender based off the person they would sleep with. They were not treated as the sexy demons as portrayed in media recently. Nobody wanted to sleep with one. The idea of encountering one was viewed as terrifying.

source?

In terms of the fact that incubi also go into dreams, literally any and all search regarding this fact will agree with my statement. I don't get why I need to prove it when anyone can spend 10 seconds googling it and know it is true. I have no clue where someone got the idea otherwise. In terms of them scaring people, look up any info on their correlation to sleep paralysis. Modern anthropologists and psychologists believe succubi and incubi to be a supernatural explanation for that. Sleep paralysis is generally considered terrifying and is often associated with things like PTSD, panic disorders, and anxiety disorders. Do those sound like something anyome would want to experience? As for appearance? Well, that has a lot more variation, especially because one of their obvious characteristics is that they are shapeshifters. I'm going specifically with the Medieval European version as the term Succubus is from there, and that is the form most modern stories adapted and changed from, though to a rather large degree. In the older legends, they were considered to have faces like gargoyles, and long claws on both their hands and feet. In some stories, they didn't even walk - they crawled across the ground when moving. This is, of course, specifically regarding "succubi/incubi." Creatures with similiar characteristics yet appearing beautiful in real like certainly existed before that, but they were not called succubi. They had their own names. Similar stories are so old and so widespread, with appearances varying from beautiful to hideous, that picking from them to find an origin is pointless. So I stuck with the actual word we are using here. WebNovel doesn't allow posting links, so I can't post direct sources. However, as I said before, a simple, quick google by pasting any of my info here will give you plenty of results to verify it. Honestly, I wonder if you asked for a source just to troll me, as this isn't exactly a niche topic. If so, I'll accept that I fell for it and wasted my time with an in depth explanation. Though I'm sure some random trivia lovers might enjoy reading my wall of text.

Well, yeah third rate succubus system

damn, u did the research 👏!