SSS Ranked Taboo Student

So first of all you know the genre from the title.  A system and transmigration is involved.  The story is actually pretty good.  He doesn't get a system and all of sudden simping sort of while collecting harem or one of those weird I want them all pure while I violate them that you run into with these type of stories.  Another thing the gals don't just magically fall in love to him while he abuse them or just ridiculous let's bang all the time with no development.  This one is actually pretty good.  He is evil, there some plot to the madness and they are resisting but what can you do with enough smut to fulfill the requirement of these kind of story.