A mysterious person familiar with the origins of Protagonist Press' employees Kiriko
and Yamamoto and with Mika's background has appeared. But they're really an
assassin sent by a faction posing a threat to the Magic Market!
After investigating Mika's past before she started up Protagonist Press and judging her
as dangerous to the world of magic, they have been entrusted with a mission to kill
her! While Mika herself is unaware, the threat to her life nears ever closer in volume 5!