World Trigger manga volume 27 features story and art by Daisuke Ashihara.

It's the final day of the battle simulation exercises, and the formerly superior Ninomiya's Squad 8 is in decline now that others are exploiting the weaknesses of Chika's units. While Chika grows more and more frustrated, Ninomiya himself is keeping tight-lipped about the whole thing… That night, it all comes to a head when an irritated Ema confronts Ninomiya!