Having attended Mihama Academy for about a year, Yuuji Kazami has seemingly found his place within the school, but he suddenly decides to pursue a promotion in CIRS. After consulting JB about his intentions, they both thoroughly examine Yuuji's documents and dissect the events of his upbringing to determine if the job is fit for him. Meanwhile, unbeknownst to the two, the girls of Mihama uncover some torn documents in Yuuji's room. After restoring the papers, they discover the story that has formed—or perhaps broken—Yuuji into the man he is today. However, what was thought to be history has haunted him to the present, and the chains of the past begin to drag him back into the darkness

The three games have been licensed in English and published worldwide by Sekai Project in There have been two manga adaptations published by Akita Shoten and Mag Garden. Subsequently, anime adaptations of the two sequel games aired between April and June An anime film adaptation of Grisaia: Phantom Trigger premiered on March 15,

Ayaka Suwa young. He is a second-year student at Mihama Academy who is known as "Ace number ", he receive this name after his master died, an assassin for a Japanese government agency and a black ops who is employed by Ichigaya. Growing tired of his aimless existence, he desires a normal school life.