Is My System in Traveling to Another World Quite Humane?

It's been a year since I, Su Yun, came to this world full of beasts. The original owner of this body died of cancer like me, so he asked me to take care of his sister. At the same time, I was very sad when he died of cancer, so I began to regard his sister as someone with the same life as me. On the day of graduation, my system came back, and I started my beast-control cheating journey. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.