A Mouthful of My Loli Master's Milk Makes Me Unparalleled

Traveling through another world with a system, I thought I could be unparalleled, but I didn't know that if I wanted to upgrade this damn system, I would need to be beaten up constantly. Just when I was about to go crazy under the beatings of countless people, a loli appeared and domineeringly said that she wanted to accept me as a disciple. Hmph, facing the temptation of the loli, I agreed. Haha, after all, she will grow up one day. It's just I didn't know that she would grow up so fast...