OVA released with the 9th volume of the manga.
Mysterious Girlfriend X: A Mysterious Summer Festival has finished airing and it has 1 Episodes. It is also Known as: 謎の彼女X 謎の夏祭り, Nazo no Kanojo X: Nazo no Natsu Matsuri
Genres: Japan , Earth , Asia , Present , Ecchi , Romance , Mystery
Try our anime quiz: Anime Characters Guessing Quiz/Game
Top 5 Anime Like Mysterious Girlfriend X: A Mysterious Summer Festival (Nazo no Kanojo X: Nazo no Natsu Matsuri) [2026 List]
5. Speed Grapher
Ten years after the Bubble War, the dichotomy between the rich and the poor in the world becomes more prominent and Japan is no exception. The rich seek to satisfy their desires and derive pleasure for themselves, and Tokyo has materialized into such a city as a result. Saiga, once a war photographer, works for Hibara Ginza in the capitalist state of Tokyo. He infiltrates the Roppongi Club, a secretive base located in the red light district of the city, to collect information about them. However, he was caught in the process and brought forward to a girl called Kagura who was in the midst of a ritual. His contact with Kagura awakens his special ability: the power to make things explode when photographed. In order to unravel the mystery behind the Roppongi Club and Kagura, Saiga begins his solitary battle.
Speed Grapher has finished airing and it has 24 Episodes. It is also Known as: スピードグラファー, Speed Grapher
4. Kono Naka ni Hitori, Imouto ga Iru!
Is insanity hereditary? Shougo Mikadono's beginning to think so, because the terms of his late father's will seem crazy and following them may drive Shougo bonkers as well. Oh, it sounds simple at first: before Shougo can claim his VERY large inheritance, he just has to start attending a certain new school and find a nice girl to marry. It's a little unromantic, but perfectly do-able, right? After all, all the girls seem quite friendly, so all Shougo has to do is find one he has something in common with. EXCEPT, and here's the kicker, it turns out that Shougo has WAY too much in common with one of them, because she's actually his long lost sister! And he has no idea which one she is! Will Shougo meet and court his Miss Right without committing something very morally wrong? Can he find his future bride without slipping into the wrong set of genes? And if his little sister does reveal herself, just how much will be revealed and under what circumstances?
NAKAIMO - My Little Sister Is Among Them! has finished airing and it has 12 Episodes. It is also Known as: この中に1人、妹がいる！, NakaImo, One of Them is My Younger Sister!, Who is Imouto?
3. Gokukoku no Brynhildr
Ten years ago, Ryouta Murakami set out with his best friend Kuroneko to find proof of alien life. A tragic accident occurred, killing Kuroneko and injuring Ryouta. In honor of Kuroneko's memory, Ryouta now searches the night sky for alien signs, determined to prove that his friend had been right, and that aliens really do exist.
Then one day, a new transfer student comes to his class and shatters everything he believes: her name is Kuroha Neko, and she looks exactly like the deceased Kuroneko. Kuroha denies being Ryouta's friend, but there’s something strange about her. She somehow aced a difficult test to transfer in, but doesn't know her multiplication tables. She possesses inhuman strength and strange abilities. And strangest of all, she predicts death.
After Kuroha displays supernatural strength in saving his life, Ryouta becomes a part of Kuroha's life, learning about her past and the hidden forces that exist in the universe. As he sinks more and more into a world of artificially created witches and magic, Ryouta must allow his scientific mind to accept that Kuroha has a very real power - the kind of power some forces will stop at nothing to get a hold of.
Brynhildr in the Darkness has finished airing and it has 13 Episodes. It is also Known as: 極黒のブリュンヒルデ, Gokukoku no Brynhildr
2. Nisemonogatari
If Koyomi Araragi thought his life couldn't get any more complicated after meeting Hitagi Senjogahara, Mayoi Hachikuji, and Suruga Kanbaru, he's sorely mistaken.
Without any knowledge of how it came to be, Koyomi finds himself in an unknown place as a prisoner. The reason for and answer to his predicament seem to lay in Hitagi's past and the con artist Kaiki Deishuu, but it becomes clear that there's much more to it than that, and it will threaten the well-being of those Koyomi holds dear.
The second story arc of Nisemonogatari focuses on Koyomi's sister Tsukihi. When Koyomi meets a pair of enigmatic women who know suspiciously too much about him and his friends, he couldn't have anticipated the ramifications of their presence. Now Tsukihi's life may very well be at risk, and the cause behind it will shake the foundation of everything Koyomi knows about his sisters.
Nisemonogatari has finished airing and it has 11 Episodes. It is also Known as: 偽物語, Impostory
1. Bakemonogatari
Koyomi Araragi, a third-year high school student, manages to survive a vampire attack with the help of Meme Oshino, a strange man residing in an abandoned building. Though being saved from vampirism and now a human again, several side effects such as superhuman healing abilities and enhanced vision still remain. Regardless, Araragi tries to live the life of a normal student, with the help of his friend and the class president, Tsubasa Hanekawa.
When fellow classmate Hitagi Senjougahara falls down the stairs and is caught by Araragi, the boy realizes that the girl is unnaturally weightless. Despite Senjougahara's protests, Araragi insists he help her, deciding to enlist the aid of Oshino, the very man who had once helped him with his own predicament.
Through several tales involving demons and gods, Bakemonogatari follows Araragi as he attempts to help those who suffer from supernatural maladies.
Bakemonogatari has finished airing and it has 15 Episodes. It is also Known as: 化物語, Ghostory
