Nazo no Kanojo X: Nazo no Natsu Matsuri

Mysterious Girlfriend X: A Mysterious Summer Festival

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Alternative Titles

Japanese: 謎の彼女X 謎の夏祭り
English: Mysterious Girlfriend X: A Mysterious Summer Festival
More titles


Type: OVA
Episodes: 1
Status: Finished Airing
Aired: Aug 23, 2012
Producers: None found, add some
Licensors: None found, add some
Source: Manga
Genres: MysteryMystery, RomanceRomance, EcchiEcchi
Demographic: SeinenSeinen
Duration: 26 min.
Rating: PG-13 - Teens 13 or older


Score: 7.281 (scored by 2481624,816 users)
1 indicates a weighted score.
Ranked: #31602
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #3316
Members: 44,842
Favorites: 95

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Ranked #3160Popularity #3316Members 44,842
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Episodes: /1


OVA released with the 9th volume of the manga.

The day when Tsubaki goes to the summer festival with Ueno, Oka, and Urabe.


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Related Anime

Characters & Voice Actors


Nagai, Masaru
Sumiya, Kenji
Watanabe, Ayumu
Director, Episode Director, Storyboard
Mima, Masafumi
Sound Director


Opening Theme

Apple Music
Amazon Music
Youtube Music
"Koi no Orchestra (恋のオーケストラ)" by Ayako Yoshitani

Ending Theme

"Houkago no Yakusoku (放課後の約束)" by Ayako Yoshitani


Aug 27, 2012
Mysterious Girlfriend X is a difficult series to fully explain. It has the mystery, the drama, the scissors, the beach tans, the dreams, the jealousy, and the drooooool. And of course, romance series now a days has most if not all of those elements in one way or another; the beach episode, the jealous boyfriend/girlfriend, the fanservice, and childhood crushes. Then of course, there's MGX: The Endless Summer of mystery, drool, and girlfriend.

Nazo no Kanojo X OVA (also known as Mysterious Girlfriend X) is an OVA released with the 9th volume of the manga in the hot summers of August. As the series already finished ...
Aug 29, 2012
The OVA for Mysterious Girlfriend X is here, and includes an original story not seen in the manga. However, it still includes the characters, concepts, and relationship development you'd expect from an episode of MGX.

It slightly misses the high bar set by the full series though - Urabe and Tsubaki must overcome a wholly supernatural phenomenon that goes beyond the strange nature of her drool which feels slightly out of place. It is only temporary though, and serves not only slightly further their relationship, but to also have cameos recognisable by fans of the authors' previous works.

The relationship pay off didn't seem as important as ...
Sep 1, 2012
Mixed Feelings
‘Skeptical’ is the word which best sums up my feelings when I sat down in front of my laptop and prepared myself to watch the Nazo no Kanojo X OVA. I’ve had a less than savoury experience with OVAs in the past, finding they do little to add to the show, existing mainly to provide fans with the excessive fanservice forbidden by the show either due to the time it airs on TV or by the fact they had to stay suitable for their target audience- and considering Nazo no Kanojo’s pushed boundaries within its TV show (which are always, comparatively, more reserved)… well, can ...

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Recent News

OVA of Nazo no Kanojo X Announced

According to Amazon Japan, an OVA of Nazo no Kanojo X was announced to be released on August 23rd. It will be bundled with the ninth volume of the original manga. more

Recent Forum Discussion

Poll: Nazo no Kanojo X OVA Episode 1 Discussion ( 1 2 )
Kokujin-kun - Aug 22, 2012
65 repliesby yveltalkyogre »»
Apr 3, 2023 3:13 PM
Artix86 - Aug 27, 2012
4 repliesby SpectrumDT »»
May 10, 2018 3:47 AM