The story revolves around
Koyomi Araragi, a third-year high school student, now a quasi-vampire after surviving a vampire attack, with the help of
Meme Oshino, a specialist in the supernatural. Despite having some superhuman abilities, such as regeneration, Koyomi tries his best to live life as a normal student, but keeps encountering girls with supernatural problems. As Koyomi walks up the stairs, he notices a woman falling from the top of the staircase. He catches her, but notices that the woman,
Hitagi Senjougahara has no weight to her. Naturally, Koyomi finds this unusual and realizes something is wrong. Determined to help her, he goes to
Tsubasa Hanekawa to learn more about Hitagi. However, after attempting to confront her, she refuses his help and then proceeds to staple his mouth threatening him to not mess with her. Koyomi however not listening to her insists, and then runs after her to show that the wound she made in Koyomi's mouth has fully healed. Convinced with this and realizing he has been involved with oddities, she accepts the help of Koyomi. Koyomi takes Hitagi to the same person that helped him, Oshino Meme. In the past, Hitagi Senjougahara's mother was involved with a cult and brought a member of the cult to their house. The cult member attempted to sexually assault Hitagi, and her mother did nothing to stop it. Hitagi then hurt the man in self-defense. As punishment, the cult took the mother away from the family. Oshino tells her that the curse is a crab, an oddity that cuts the host's weight. In Hitagi's case, she had family affairs and had intentionally removed the guilt and burden of the issues, leading to being bitten by the crab oddity that stripped her of her weight. Oshino suggests they return at midnight for the ritual. After a while, Koyomi and Hitagi head to the cram school again. They see Oshino who has prepared the ritual and it starts immediately. The crab becomes visible and attacks Hitagi but she realizes to get rid of it, she must bear the weight of all the guilt of her family affairs. Gaining her normal weight back, she thanks Koyomi and befriends him. ==Production==