Nana Maru San Batsu
English title: Fastest Finger First
Japanese title: ナナマル サンバツ
Alternative titles: 7O3X, Nanamaru Sanbatsu
Type: TV
Source: Manga
Episodes: 12
Status: Finished Airing
Aired: Jul 5, 2017 to Sep 20, 2017
Broadcast: Wednesdays at 01:59 (JST)
Duration: 23 min per ep
Rating: PG-13 - Teens 13 or older
Studios: TMS Entertainment
Producers: Toei Video, Enterbrain, Nippon Television Network
Themes: School, Strategy Game
Demographics: Seinen

As soon as he entered high school, the first year student Koshiyama Shiki was invited to the mysterious Quiz Study Group led by his senpai. What will Shiki run into when being dragged along by his class mate Mari into the dazzling world of competitive quizzes?!

(Source: Comic Walker)