Toaru Majutsu no Index x Dennou Senki Virtual-On: Toaru Majutsu no Virtual-On  

とある魔術の禁書目録×電脳戦機バーチャロン とある魔術の電脳戦機〈バーチャロン〉

In Academy City, there exists a renowned competition involving advanced technology. Essentially, it involves giant robots battling each other on the streets. This event, known as "Virtual-On," has gained immense popularity among students due to its similarity in skill level between Level 5s and Level 0s. Recently, Index engaged in a hand-to-hand battle with Touma using her white Bal Bados in Virtual-On. Introducing herself as Ririn Furashina, she clarified that she was not Ririna Munya. Meanwhile, an insomniac girl arrived in Academy City, and Kamijou encountered an unexpected accident involving Virtual-On machines fusing with the city. This incident signaled the impending grand battle involving Misaka Mikoto with her Raiden, Shokuhou Misaki with her Angelan, and many other participants.