DOUBLE-S is a South Korean manga artist who has collaborated with Japanese manga writers. From 2005 to 2015, DOUBLE-S illustrated the science-fiction action series “Until Death Do Us Part,” written by Hiroshi Takashige. The representative work “Issak,” written by Shinji Makari and illustrated by DOUBLE-S, is a historical action manga set in the Holy Roman Empire during the Thirty Years’ War. It follows Issak, a Japanese gunsmith who travels to Europe in pursuit of a stolen matchlock and fights as a mercenary marksman. Detailed depictions of firearms, shooting techniques, siege warfare, and military operations shaped by religious conflict give the series its visual and historical texture. Created through a cross-border division of labor between a Japanese writer and a South Korean artist, “Issak” received the second Saito Takao Award in 2018.