Synopsis
Koyomi Araragi has only recently recovered from a vampire assault and encountered multiple girls plagued by supernatural afflictions. On top of everything else, he wakes up one morning to find himself abducted and bound by his girlfriend Hitagi Senjougahara. Araragi's sister Karen has gotten into trouble with Deishuu Kaiki, a con artist who once swindled Senjougahara's family. Consequently, Senjougahara has trapped Araragi to protect him from the cunning Kaiki. Yet when Araragi receives a desperate message from Karen, he leaves to save her. Beyond Karen's predicament, Tsukihi, Araragi's other sister, is dealing with her own problems. And when two enigmatic women enter their lives, not even Araragi can foresee their real intentions or the devastating secrets about his family that are soon to be uncovered.
Background
Nisemonogatari adapts the fourth and fifth volumes of NisiOisiN's Monogatari Series: First Season.