Marginal Operation manga volume 5 features story by Yuri Shibamura and art by Daisuke Kimura.

Chaos Hangs in the Air...

Everything seems to be going wrong as Arata's client, the Japanese government, fumbles in their handling of the job's agreements. As conflict begins to heat up within the country, Arata is forced to take to the bustling streets of Tokyo and face off with the terrorist cult. Will he and the kids be able to survive on this unfamiliar battlefield?

Marginal Operation manga volume 6 features story by Yuri Shibamura and art by Daisuke Kimura.

After forming a truce with the cult they were originally contracted to confront, Arata and his crew set out for Thailand. Immediately upon landing, a rich aristocrat by the name of Li Seiran comes to him with a proposition—to stop a certain company from trafficking children out of the country. But with his reputation as the renowned Headmaster now flowing through mercenary channels, will Arata still be able to keep his kids safe?

Marginal Operation manga volume 7 features story by Yuri Shibamura and art by Daisuke Kimura.

A Storm Is Brewing...

Having come to Thailand in the hopes of finding a way to support his children without forcing them onto the battlefield, Arata instead finds himself being asked to recruit more children from the slums and expand his mercenary operations. It may be the only way to save them from being exploited by a far more predatory company, but he still feels conflicted about sending yet more children to war. Will he be able to escape this industry before it claims the lives of his precious kids?