They loaded the evil love system

By chance, he discovered the secret of the girls around him. It turned out that each of them had loaded an evil love system. As long as they did strange things to him every day, they would get rewards from the system.
Magical items, powerful skills...
Watching them becoming more and more bold, Xin Yu fell into deep thought. What should he do if he is not the host of the system but also wants the system reward?
Then become their host!