Death March to the Parallel World Rhapsody

Suzuki Ichirou, a programmer enduring an intense and grueling work schedule, falls asleep under his desk and wakes up in a fantasy world that feels both familiar and different.

Satou finds himself trapped in a parallel world that resembles a blend of video game projects he has worked on, using his knowledge of game mechanics to navigate. He begins by traveling to the nearest city in hopes of setting up a base and figuring out his next steps.

Satou and Zena explore the city, but their journey takes a dark turn when they witness demi-humans being mistreated by a hostile crowd. As tensions rise, they and others are unexpectedly trapped in a perilous labyrinth.

Satou begins his escape from the labyrinth with the help of the slaves, working to free the others trapped inside.

Satou decides to take responsibility for Tama, Pochi, and Liz, becoming their new master to prevent them from returning to servitude. Along the way, he also takes in the enigmatic sisters Arisa and Lulu, with the younger sister holding a mysterious connection to Satou's original world.

Satou must address the need for permanent housing for the five girls under his care, but his plans are interrupted when the city is attacked by massive insects.

Satou and his companions prepare to return the elf girl he rescued to her forest home, beginning with training to survive in the wilderness.

Mia has been taken captive, and Satou pursues the mysterious entity responsible, leading him back to the Cradle, the towering structure where she was first rescued.

Satou arrives at the summit of the Cradle, but before he can retrieve Mia, he must face a final obstacle that results in an unexpected new companion joining his group.

Mia's journey back home begins, and Satou uses the long journey to explore and test the mechanics of the fantasy world.

The group continues their mission to return Mia, as Satou interferes with a plot by local nobles centered around the distribution of healing potions, leading to conflict.

Satou must navigate a complex arrangement that has been manipulated by various unforeseen obstacles, testing his ability to succeed despite the challenges.