Deatte 5-byou de Battle
English name: Battle Game in 5 Seconds
Genres: Supernatural
Type: TV, Episodes: 12
Aired: Jul 13, 2021 to Sep 28, 2021
Studio: SynergySP, Vega Entertainment
Source: Web manga
Rating: R - 17+ (violence & profanity)
Synopsis:
It was just a usual morning.

Akira Shiroyanagi, a high schooler who loves games and Konpeito (Japanese sweets), has suddenly been dragged into a battlefield by a mysterious girl who calls herself Mion. The participants are told that they are "erased from the family register, involved in an experiment, and gained certain powers."

Akira is determined to win the game with his newfound powers and destroy the organization. Armed with a power no one expects and his "brain" skills, the new period of intelligence battle begins! 

(Source: MU, edited)