Grisaia Phantom Trigger is the latest chapter in Phantom Trigger's popular anime series. This new chapter is based on the original series and tells a different story from the previous chapters.

The story starts with the girls from the previous chapter, but things are now more complicated as the new chapter introduces more characters and new events. The story is told from the perspective of the main character, the android named Phantom, who is the child of the main character from the previous chapter, Grace.

Phantom is now in a new school, where she meets a new friend, the android Fumi. Fumi is from the same school as Phantom, and she has been chosen by the organization called SORD (Social Ops, Research & Development). SORD is a secret anti-terrorist organization, and the purpose of the organization is to train a new generation of operatives to defend the country against future threats.