I Work as a Housekeeper in a Female Channel Novel

Once I met the boss, his father. "This is a five million agreement. As long as you are the housekeeper of our Gu family for five years, the five million will be yours!" Faced with the sky-high price agreement, I happily refused, but he added another five million, so I reluctantly agreed. After all, the other party was too sincere, and I was a boy who would not refuse. But later I found out that the extra five million was actually for mental damages! This book is also called "Starting as a rich butler, but the boss is still a little kid" (not first person)