Cambrian 2

A few days have passed since the incident at the lab. It all seemed like a dream until one day Keiko feels an awkward sensation all over her body. At the same time, her boyfriend started acting differently around her such as arguments leading to violence, etc. Why is her boyfriend suddenly acting differently? What does Haruhiko, Keiko's former professor, truly want to achieve? What is Cambrian big bang? Let the evolution begin!