Despite liking it very much, I can't for the life of me remember the name or find it again. What I do remember probably sounds generic as hell, but it's all I've got. The first chapter showed a succubus luring a guy in for "intimate activities" just to end up killing him. Either the victim or a witness was some kind of security guard, I think. The immediate following chapter switched perspectives to the actual main character, who had some sort of ability. Don't remember what it was. Either of their powers may have related to plants in some way, or maybe that's a false memory of mine. He may have had some teacher figure regarding that ability, and I remember the first major story arc possibly ending with a major battle between the MC and the succubus. Don't know if she was defeated or not. Don't know how the story continued from there. I remember it being action-focused, but I could be extra wrong. I also remember being drawn in thinking it was an ecchi series, but it either wasn't that, or was but I stayed for the story and characters.