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! (Source: J-Novel Club)

Marginal Operation was published digitally in English by J-Novel Club from October 2, 2019 to January 4, 2023, and in print from December 3, 2019 to December 12, 2023. The series was also published digitally through K Manga.