Game-loving high school student Akira Shiroyanagi survives an encounter with a monster, only to be fatally wounded by a girl named Mion. Soon after, he wakes to find himself part of an "ability focus group," a large group of people granted powerful abilities and forced to fight - and possibly kill - one another!
The "turn your hand into 
a cannon" ability...
...قدرة تغيير اليد إلى مدفع
L'abilità "trasforma la mano in un cannone"...
A habilidade de transformar
o braço em canhão...
Способность превращать руку в оружие...