Milf System: Living Inside A Harem Web Novel

[Warning: The Content Is Extremely R18] [Don't Blame Me If It's Addictive] Like other typical protagonists, our MC didn't die and transmigrate into another world. He was just sleeping in his bed, unaware of the upcoming future and the next dawn, he woke up only to find himself in an unfamiliar yet strangely familiar bedroom. It looked exactly like the scenario of a smut web novel he had read a few months ago. [Task: Complete Hundred Missions]