Grisaia: Phantom Trigger is a visual novel series by Frontwing. It follows the story of five girls at Mihama Academy, a school built to facilitate the “absolute protection” of its students. The protagonist, Yuuji Kazami, transfers into Mihama Academy as part of his plan to find out why he was sent there in the first place. As he begins to settle in and make friends with the other students, he discovers that each one of them has their own secrets and stories to tell. With their help, Yuuji must unravel the mysteries surrounding Mihama Academy and come to terms with his own past.