The manga Deatte 5-byou de Battle (roughly translated as "Battle in 5 seconds after meeting") by Saizou Harawata and Miyako Kashiwa is getting an anime adaptation.
The official website revealed the first look:
Synopsis
The story begins when Akira Shiroyanagi, a high school student who loves games and sweet konpeito,suddenly becomes involved in a battle over a mysterious girl who goes by the name of Mion.
Harawata posted the original manga online before Koshiwa released the "remake" with new illustrations in Shogakukan in 2015. The manga is also available on the Manga ONE app.
Finally, Death of Battle has over 2 million copies in circulation, with 15 volumes published so far.
Sources: Comic Natalie, Deatte website