Vol. 6: The Demon King marries Toma, impregnates him, and gets... cucked!?
Previously, our brave hero entered a new world in a VR game, only to be ravaged by monsters and dragged away by two mysterious men.
He awakens later in the great Demon King's castle...

In exchange for the safety of this world's inhabitants, Toma is coerced into a marriage with the king, who relentlessly inseminates him until his new bride becomes pregnant with his offspring! Fully devoted to his new role as wife and mother, Toma slowly begins to forget about reality and his part-time job, and starts to embrace his new life in the virtual world.

But then, the Demon King's close subordinate -- and brother -- goes berserk out of jealousy, and an obsessive plot of cuckoldry begins to unfold!

Will Toma ever be able to escape back to his own world!?