For five years since the events of the prequel Erica has been living peacefully with Satoru. Satoru left the laboratory shortly after creating Erica. Following his notes the laboratory was able to create Erica Version 2, but the result was poor and director proceeded to illegal means. Meteor shower was launched to mount Fuji and at the same time Erica started to suffer from brain disorder. What caused the illness? Will Satoru be able to find the cure?

[From vndbreview]