Chloroform

In order to create a mind slave, Yandere-chan raised her knowledge on chemistry (or Biology?) and took the chloroform from the Biology lab, along with the cloth from the Cooking Club and gloves from the Drama Club, and drugged Saki Miyu to sleep..

This idea came when I was sketching for my previous work XD (Yandere chan choking Kokona with a computer cord). So yeah, technically the same as tranquilizing Saki Miyu. And I gotta say, I like the new cosmetic update, so i get to have fun with drawing her hair here XD.