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7O3X: Fastest Finger First Anime's Quiz Videos Reveal Satsumi Matsuda as Jinko Sasajima

Toei began streaming a quiz video on Tuesday for 7O3X Fastest Finger First, the television anime adaptation of Iqura Sugimoto's Nana Maru San Batsu (literally, "7 O 3 X" or "7 Right, 3 Wrong") manga. The video reveals the character Jinko Sasajima, and the voice actress for the character asks if viewers can guess her identity. A separate "answer" video then revealed on Thursday that Satsumi Matsuda (Saki - The Nationals' Hiroe Atago, Magical Girl Raising Project's Yunael) will voice the character.

Question Video

Answer Video

The official website for the series also revealed a second key visual on Thursday.

The anime will premiere on NTV in July, and will have 12 episodes.

The show stars:

Shun Horie as Shiki Koshiyama

Umika Kawashima as Mari Fukami

Takuya Satō as Gakuto Sasajima

Kaito Ishikawa as Chisato Mikuriya

Additionally, Tasuku Hatanaka will voice the character Daisuke Inoue, and Takuma Nagatsuka will voice the character Akira Sonohara.

Masaki Ōzora (12-Sai: Chiccha na Mune no Tokimeki) is directing the anime at TMS Entertainment. Yuuko Kakihara (Orange, Digimon Adventure tri.) is supervising the anime's scripts. Makoto Takahoko (Thunder Jet) is drawing the character designs. Hajime Hyakkoku (Saekano: How to Raise a Boring Girlfriend, K-ON!) is composing the music.

A flyer at AnimeJapan 2017 describes the series:

The last thing freshman Shiki Koshiyama expected was to be asked to join the Bunzo High School "New Student Fast Finger Quiz Championship." A bookwork at heart, he hates being the center of attention and shudders at the mere thought of participating. To add insult to injury, his classmate Mari Fukami overwhelms her competition by pressing the buzzer even before the entire question is read. "It's too late to hit the buzzer after you know the answer. A split second is all it takes to determine who wins or loses," she declares.

After observing Mari for a while, Shiki discovers a way to determine the answers to a quiz. His world expands as he meets colleagues and senior members of the Quiz Club, as well as their formidable rival Chisato Mikuriya. He experiences the joys of answering correctly and the frustrations of not getting to the buzzer quickly enough. He and his colleagues hone not only their knowledge, but also various techniques as they pursue victory in the world of competitive quiz.

Shiki Koshiyama is about to dedicate his teenage years to quizzes. You too should try becoming the next quiz champion!

Sugimoto launched the manga in Kadokawa's Young Ace magazine in 2010, and Kadokawa published the 13th compiled book volume on December 31. Sugimoto's other works include the manga adaptation of Mamoru Hosoda's Summer Wars anime film.