Looking for a manga

I'm looking for a manga: A group of students die in a his accident. Mysterious man promises to give them another life. MC becomes a slave trader in a RPG type world. He makes people his slave by putting his "body fluids" on them ie kiss and and semen. Has 3 girl slaves. A girl from his class becomes a knight. Mc sex with the girl. Knight Girl also becomes his slave. But its not complete mind slave. The girls chose to stay with mc and mc occasionally commands them to do stuff. Like a command spell of fateseries. Its not a hentai but it has sex scenes. Pls halp via /r/HentaiSource http://ift.tt/2DRSHD6