My Servant

I was picked up by a Duke's house as a slave. Apparently, I was an abandoned child, so I'm also a slave. It's normal for slaves to work, and there are practically no slaves who don't work. So I worked. I worked without rest. However, my master is kind, and he gives us slaves 'free' time. While other slaves spend their free time resting, I spend that time studying, which I was told would be useful in the future. Then, an angelic child appeared and asked, "Who are you?" So I answered, "I am a servant." That was a mistake. That angel was the Duke's daughter, a noble, mischievous, and a little brat. For some reason, she took a liking to me, and I was taken to the Royal Capital's academy by her. *Note: This is a web novel. There are some differences in content from the book version, so please understand.*