While waiting for a new update, I've been playing through the dark route and I found a bug. This is a somewhat major spoiler for the lily/sophia dark route. so if someone who hasnt played through it yet and wants to shouldn't read this.
So, basically I've been trying out multiple options and When I got to the part where you decide whether or not to inject Lily with the drug or not. I opted not to and well. You know what she does. However, I went back to Lily's house many days later and she was at her house as if you injected her with the drug and it looks like the story progresses like that.