The Split-Personality CEO's Daily Life

As a normal person born into an eccentric family, Mo Yuzhao thinks his life is full of hardships. None of his elders are human, and his older sister is a lunatic. During the summer of his eighteenth year, he was forced to accept a request from his father: look after a split-personality CEO who loves writing stories about little girls. That would have been fine, except he also ran into a System. Can someone tell him what the heck a Supreme Bottom Cultivation System is? Completed novels with good stats: Quick Transmigration: The Flirting Maniac, I Want to Know Who Framed Me, The Male Supporting Character Collection System Theme: Fall in love with a CEO