Mysterious Girlfriend X: A Mysterious Summer Festival

謎の彼女X 謎の夏祭り (Nazo no Kanojo X: Nazo no Natsu Matsuri)

7.3(26,997)

MAL Score

Ranked #3334

Popularity #3680

Ecchi
Mystery
Romance
Gag Humor
Love Status Quo
School

Episodes: 1
Duration: 26 min
Aired: Aug 23, 2012
Status: Finished Airing

Synopsis

Released as an OVA bundled with the 9th volume of the manga, *Mysterious Girlfriend X: A Mysterious Summer Festival* follows Tsubaki as he heads to a summer festival alongside Ueno, Oka, and Urabe.

Amid the lively seasonal atmosphere, their outing brings the group together for a brief, intimate detour that blends romance, teasing ecchi moments, and the title’s signature touch of mystery.

Otaku Consensus

Mysterious Girlfriend X: A Mysterious Summer Festival works because it understands the TV anime’s best assets: Hoods Entertainment’s off-kilter visual mood, Ayako Yoshitani’s magnetically odd Urabe, and a compact pace that turns a side episode into a concentrated dose of atmosphere. The OVA is most often praised for adding a sharper mystery/supernatural flavor to the franchise’s romance formula, while the recurring complaint remains the same as the series and manga: if the central couple’s strange ritualized intimacy does not hook you, the status-quo structure can feel repetitive.

Why You Should Watch

Watch this if you want a romance OVA that treats awkward desire as something eerie, funny, and oddly ceremonial rather than cute in the usual school-comedy way. It is best for viewers who like the charged silences and bodily weirdness of Bakemonogatari but want less verbal sparring, or the summer-evening atmosphere of a festival episode without the tidy emotional payoff of a standard rom-com special. At one episode, it is not trying to broaden the cast or reinvent the series; it refines the appeal of Mikoto Urabe and Akira Tsubaki into a small seasonal piece where teasing ecchi beats, deadpan gag humor, and a faint supernatural aftertaste sit in the same frame. If you already liked the TV anime’s mood more than its plot progression, this is the addendum worth seeking out.

Key Characters

A
Akira Tsubaki(VA: Miyu Irino)
Akira remains the audience’s anchor: an ordinary schoolboy whose sincerity makes the series’ stranger romantic rules feel emotionally legible instead of merely eccentric.
M
Mikoto Urabe(VA: Ayako Yoshitani)
Mikoto is the franchise’s make-or-break figure, a deadpan, scissor-carrying enigma whose appeal depends on the viewer buying into her mix of distance, tenderness, and unsettling intimacy.

What Makes It Stand Out

1
The OVA was released as a bonus bundled with the 9th volume of the manga, making it a source-adjacent extra rather than a conventional television follow-up.
2
Hoods Entertainment’s adaptation is valued less for plot momentum than for atmosphere: reviewers singled out the main series’ half-lit rooms, sunset routes home, eerie soundtrack choices, and distinctive character designs as central to its identity.
3
Unlike readers’ complaints that the manga can feel repetitive, the anime adaptation is noted for presenting material chronologically, which helps the relationship beats feel smoother and less like isolated recurring sketches.
4
This special is frequently singled out by fans as the OVA that pushes the franchise’s mystery and supernatural edge harder than the usual school-romance routine.
5
The franchise’s opening song, “Orchestra of Love,” is performed by Ayako Yoshitani, the same performer who voices Mikoto Urabe, tying the heroine’s presence directly into the anime’s musical identity.

Fun Facts & Trivia

Fun fact 1: A Mysterious Summer Festival aired on August 23, 2012 and consists of a single episode, positioning it as a compact post-TV companion piece rather than a second season.
Fun fact 2: The OVA was produced by Hoods Entertainment, the studio behind the TV anime’s distinctive adaptation style and its much-discussed dreamlike visual passages.
Fun fact 3: On MyAnimeList, the OVA holds a 7.27 score from 26,973 votes, with a rank of #3331 and popularity placement of #3677 in the provided database snapshot.
Fun fact 4: Miyu Irino voices Akira Tsubaki, adding this restrained romantic lead to a career known across anime fans for major mainstream roles.
Fun fact 5: Ayako Yoshitani’s role as Mikoto Urabe is unusually central to the anime’s identity because she is also credited in the franchise’s music through the opening theme “Orchestra of Love.”