Mysterious Girlfriend X

Mysterious Girlfriend X is an anime series in the Mysterious Girlfriend X franchise
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Anime adaptation of the homonymous manga.


Mysterious Girlfriend X is an anime adaptation of the manga of the same name written and illustrated by Riichi Ueshiba. The anime is produced by Hoods Entertainment and originally aired in Japan from April 7, 2012 to June 30, 2012.


Crunchyroll began a simulcast on April 8, 2012. Sentai Filmworks licensed the anime for home video release in North America and began streaming on The Anime Network and Hulu 31 days following its airdate.


Akira Tsubaki was just living his normal school life until a strange girl named Mikoto Urabe transfers into his class. One day, without thinking, he tastes the drool left behind on her desk at school and becomes ill the next day. Urabe pays Tsubaki a visit at home, and using the same drool he tasted before, seemingly cures him. Urabe tells him that it was love sickness and that he has fallen for Urabe, and has become dependent on her drool. From then on, the two start to form a bond, discovering that their drool can transmit feelings and other things between them. Tsubaki soon finds himself with a very mysterious girlfriend.


Major characters are listed below. See the Mysterious Girlfriend X (anime) character list and Mysterious Girlfriend X (franchise) character list for more.

Akira Tsubaki (椿 明 Tsubaki Akira)
Voiced by: Miyu Irino
Age: 17, Occupation: Student
Gender: Male
The main male protagonist. Tsubaki lives with his sister and father, his mother having passed away years ago. After becoming Urabe's boyfriend he becomes quite protective of her, but has to hide it to keep their relationship a secret. Tsubaki is a fairly average boy of his age, with no special traits or skills to speak of. He is however very caring and kind. He starts buying Momoka Imai photo books because she bears a strong resemblance to Urabe.
Mikoto Urabe (卜部 美琴 Urabe Mikoto)
Voiced by: Ayako Yoshitani
Age: 16, Occupation: Student
Gender: Female, 162 cm (5'3"), 53 kg (117 lb)
The main female protagonist and titular Mysterious Girlfriend. She's generally anti-social, preferring to sleep at school rather than eat lunch with her classmates. Her parents have been absent during Tsubaki's visits to her apartment. On her first day at Tsubaki's school, she hears a voice in her head that tells her Tsubaki will be her first sexual partner, causing her to burst out laughing in the middle of class. She seems to be knowledgeable about the bond of drool she shares with Tsubaki.
Ayuko Oka (丘 歩子 Oka Ayuko)
Voiced by: Ryō Hirohashi
Age: 17, Occupation: Student
Gender: Female, 143 cm (4'1")
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Kouhei Ueno (上野 公平 Ueno Kōhei)
Voiced by: Yūki Kaji
Age: 17, Occupation: Student
Gender: Male
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Youko Tsubaki (椿 陽子 Tsubaki Yōko)
Voiced by: Misato Fukuen
Age: 24, Occupation: Housewife Role (looks after Akira)
Gender: Female
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Theme Music

Opening Theme

"Orchestra of Love" (恋のオーケストラ Koi no Ōkesutora) by Ayako Yoshitani.

Ending Theme

"Afterschool Promise" (放課後の約束 Hōkago no Yakusoku) by Ayako Yoshitani.

Season/Ep# Name Airdate
1 - 13
Mysterious Girlfriend and Boyfriend
1 - 12
Mysterious "Tug"
1 - 11
Mysterious Culture Festival
1 - 10
Mysterious Affair
1 - 9
Mysterious "Kind Of"
1 - 8
Mysterious Sensation
1 - 7
Mysterious Flu
1 - 6
Mysterious Step Up
1 - 5
Mysterious First Date
1 - 4
Mysterious Girl meets Girl
1 - 3
Mysterious Test Tube
1 - 2
Mysterious Bond
1 - 1
Mysterious Girlfriend

View all 13 episodes »

Series Credits
Person Name Episode Count
Ayumu Watanabe
Deko Akao
Kenichi Konishi
Shigemi Ikeda
Tomoki Hasegawa

To edit the cast, go to an episode page.

Original US Poster Art

General Information Edit
Name Mysterious Girlfriend X
Name: 謎の彼女X
Romaji: Nazo no Kanojo Ekkusu
Publisher Hoods Entertainment
Start Year 2012
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Aliases Nazo no Kanojo Ekkusu
Nazo no Kanojo X
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