I Am Surrounded by Mature Sisters

[Reverse recommendation, multiple heroines, ultimate sister control, all kinds of big sisters] As long as you don't get attacked by girls, you can get generous rewards? When Bai Chengze woke up, he was bound to an extremely outrageous "anti-strategy system". I thought it would be easy to keep a man's virtue, but I didn't expect to be surrounded by a group of big sisters, and the other party's methods were more cruel and had more tricks! Rich lady, black silk stockings, gentle eldest sister, girl group star sister, aloof female professor, club senior sister... I can't stand it, I can't stand it at all! Which sister can withstand such a test? !