Based on the light novel written by Carlo Zen, illustrated by so-bin, and published by Hayawaka Publishing. Two volumes have been published since 2017 and it considered still being published.
"Yakitori" is a dish of bits of boneless chicken, usually marinated, skewered, and grilled. The mercenaries are called thus because they face a huge 70% casualty rate during combat duty, and "grilling" is even the slang for serving planet-side duty.
Based on the Japanese science fiction novel Yakitori by Carlo Zen and published by Hayakawa Publishing Corporation.