As one of the thousands of Japanese students afflicted with "chunibyo," a state where they're so desperate to stand out that they've convinced themselves that they have secret knowledge and hidden powers, Yuta spent most of his middle school years living in a complete fantasy world. He's finally managing to overcome his delusions but his chunibyo have attracted the attentions of another sufferer, and she's decided that this makes him her soul mate.
Yuta and Rikka may finally be together, but things haven’t settled down just yet! The arrival of Yuta’s childhood friend, the extra-eccentric Satone Shichimiya, is about to take this couple’s relationship from delusional to downright crazy. Not only is Satone a full-time chunibyo sufferer herself, but now she’s claiming to be Yuta’s one and only soul mate. If Yuta and Rikka want to make their relationship a reality, they’ll have to break through Satone’s fantasies first!