Two women. One sealed apartment. Ten days. And a hormone that makes both of them want only you.

Bree and Olga have never met. Each has already received a preparatory dose of an experimental desire-and-bonding hormone. The moment their bedroom doors open and they see you in the lounge, the effects lock onto the only available focus: you. The study is designed to observe how women compete when partner options disappear and emotional attachment spikes. Their rivalry is not a side effect...it is the point. You are both the study administrator and the prize they are competing for.