Gakkou Gurashi! Otayori

A "project book" once sold in Comiket at the Kirara booth, "Manga Time Kirara Exhibition FINAL" returns as merchandise after 7 years! The magazine's characters visit the final Kirara Exhibition in this comic anthology book with all newly-written chapters! (Source: Kiraraten)

Set in the year between the events of the first two games, the story revolves around two new characters exclusive to the manga: Tyr and Mizuha, and the mystery of severed Gear parts falling from the sky. Members of the Post War Administration Bureau (P.W.A.B. for short) - the secretive organization responsible for many events in the games - serve as the antagonists of the story. Characters from the games, such as Sol, Ky, Axl, Potemkin and Kliff, also appear, albeit with relatively minor roles. (Source: MAL)

A sequel set after the ending of Gakkou Gurashi! which details the aftermath of the characters.