In the city of Judoh, Claire Leonelli has inherited leadership of the Mafia group "Vampire" following the death of his father. To keep Claire's and other criminal activities in check, the city's Bureau of Urban Safety has Special Services Division operative Daisuke Aurora and the super android codenamed "J" (whose identity is apparently kept in secrecy, as androids are banned in the city). With both of them around, crime now has little room to breathe in Judoh. (Source: ANN)

Hayate, Nagi and the gang spend the last days of summer break at Nishizawa's countryside vacation home. But a mysterious spirit has concocted a scheme to separate the butler from his young mistress. (Source: ANN)

Adaptation of the short story written by Manta Aisora for the first issue of GA Bunko magazine.

The day before the ceremony marking the completion of the Yajima Stadium, Nils Nielsen invites Sei Iori, Meijin Kawaguchi, and others to an exhibition battle using the new large-scale battle system he has designed. Now that they are all reunited, Sei attempts to show off the Build Strike Cosmos that he has upgraded for the exhibition, but then he notices something missing... Meanwhile, somebody takes control of the stadium's systems, sealing Sei and the others inside. Before them appears a mysterious group, which has come to challenge them to Gunpla Battle.