This novel has been published to Amazon. The entirety of volume 1, namely chapters 1-75--in addition to all the side chapters--have therefore been taken down. However, you can read chapters 75 and onwards for free.
You can also read a free sample before deciding to purchase the full version.
https://www.amazon.com/My-Sister-Villainess-Cupcake-Ninja-ebook/dp/B085HMH7NP/ref=sr_1_1?keywords=my+sister+the+villainess&qid=1583503715&sr=8-1
If you love memes, cute tree spirits and general random chaos fueled by weed and soda then you, my friend, have come to the right place