Kane Bugeja writes:
The aliens have invaded, humanity is, for the most part, unaware of any disturbance and life carries on much the same. That is unless you are the one person on Earth who has been forcibly combined with one of said aliens, parasitic in nature, and predatorial to your species. Add to that the fact that you are a fifteen year old high school student, an age bracket really not designed to handle such change and trauma. Got that? Cool, now you have a pretty good idea about the events and mindset that have afflicted our protagonist Shinichi over the course of Part I. Poor guy still has to get through Part II.