Supernatural, Action, Comedy, Romance, School Life, Seinen, Fantasy

What ought to be Sai's usual uneventful route to school becomes something extraordinary when he gets swept away to another world devoid of color! There, he witnesses two young girls' fighting before him. One of them is a blonde girl he has never seen before, and the other is Mikage Mikuro, an upperclasswoman in his high school. After returning to the real world, the blonde girl, Miriabilica Staccato, appeared as a transfer student before Sai. In order to grant her wish, she joined the battle game "Over Image" on her own and now she seeks Sai to be her companion...