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?