My Yandere Older Sister Is Losing It Again

(No pseudo-incest, and they're not biological sisters. Xia Ning was adopted.)

Mu Nianyu: If you tire your body out enough, your mind will automatically go blank, and inspiration will come naturally. (Absolutely.)

Their life together after moving in is basically a constant back-and-forth between “going nuts” and “going even crazier.”

What do they do when both their mothers show up for a surprise inspection and the whole place is a disaster?

Mu Nianyu: “Don't panic. As long as I hide the evidence in the fridge and stuff the bedsheets in the microwave, this is just a tactical retreat!”

What do they do when Xia Ning runs out of ideas and gets artist's block?

Mu Nianyu gave a wicked smile