|Slave Harem in the Labyrinth of the Other World Volume 4|
Michio's exploration of the labyrinth in the Other World had come to a halt. With only Roxanne, the duo lacked the courage and ability to proceed. With great effort, Michio was able to amass magic crystals, experience crystals, and many rare items that he ends up having to sell. In order to gain more comrades he visits the slave dealer with his new fortune. There Michio meets Serie, a dwarf girl. Serie is a slender beauty with a cute personality. Together with Serie, Michio and company continue their labyrinth exploration.