Just...look at the description.

Description: I have a mod for DDLC called "Just Yuri". It's like the end of DDLC, but instead of Monika being there, it's Yuri. You give control of this world to her. At first, she's the normal, shy, and nerdy Yuri that was in Act 1. But, you can...influence her. Suggest things that could change her... I broke her. I made her obsess over me. Made her think that I was the only thing that mattered. I MADE her into a yandere. It was sick and twisted. And you wanna know the worst part? I loved every second of it.