Marginal Operation manga volume 1 features story by Yuri Shibamura and art by Daisuke Kimura.

Our hero Ryouta Arata is an otaku who's just lost his job after the dissolution of his company. Unwilling to return to his old NEET ways, he applies online to a private military security company, thinking the benefits to be promising. After what appears to be a baffling test, he's assigned to be an "operator of operators" and begins his training in a foreign country.

Marginal Operation manga volume 2 features story by Yuri Shibamura and art by Daisuke Kimura.

Our hero Ryouta Arata is an otaku who's just lost his job after the dissolution of his company. Unwilling to return to his old NEET ways, he applies online to a private military security company, thinking the benefits to be promising. After what appears to be a baffling test, he's assigned to be an "operator of operators" and begins his training in a foreign country.

Marginal Operation manga volume 3 features story by Yuri Shibamura and art by Daisuke Kimura.

Our hero Ryouta Arata is an otaku who's just lost his job after the dissolution of his company. Unwilling to return to his old NEET ways, he applies online to a private military security company, thinking the benefits to be promising. After what appears to be a baffling test, he's assigned to be an "operator of operators" and begins his training in a foreign country. Little does he know, the life of a private mercenary is far more grueling than he could have ever imagined!

Marginal Operation manga volume 4 features story by Yuri Shibamura and art by Daisuke Kimura.

No Place Like Home... A year has passed since Arata took the child soldiers under his wing - after discovering they were on the receiving end of his orders. In that time, he has toured numerous battlefields across Asia, while doing his best to provide for the kids under his care. Fed up with forcing them to continue to fight just to survive, Arata takes them to Japan in hopes that his peaceful homeland may provide a solution to the dilemma he faces.