#1 The Monster of the Abyss

Betrayed by his classmates after being summoned to another world, Hajime Nagumo falls into the abyss of a labyrinth and desperately tries to survive. However, he has zero combat abilities as a Synergist, resulting in lethal wounds. Even in another world, he remains the weakest and he falls into the depths of despair.

#2 Pandora’s Box

Hajime comes across a door that’s guarded by a pair of cyclops. He defeats them easily, but what will he find sealed beyond those doors?

#3 The Golden Vampire Princess

The fateful encounter between Hajime and the vampire, Yue. With Hajime’s heightened abilities and Yue’s vampiric abilities, they vanquish the monsters that lay in ambush. Trust between the two who were “betrayed” is built. Knowing that the path back home may lie in the deepest part of the labyrinth, Hajime and Yue decide to venture deeper.

#4 Guardian of the Depths

After defeating the monsters, Hajime and Yue finally reached the 100th floor of the Great Orcus Labyrinth. What awaits them at the bottom is a massive six-headed monster with crimson-red eyes and razor fangs—Hydra. Despite the new weapon and Yue’s magical powers, they both struggle. Before the Hydra launches its surprise attack at Yue, Hajime leaps before her…

#5 The Maverick’s Lair

#6 Worthless Rabbit

Yue and Hajime successfully escapes the Great Orcus Labyrinth and make it to the surface alive. However, before the couple could take a breather, they encounter a rabbitmen named Shea, who wishes for Hajime to save her tribesmen from a crisis. Knowing that Shea will be an crucial addition to conquer the path that lies ahead, Hajime and Yue decide to accept her request. The party head towards Shea’s hometown, the Grand Tree of Haltina, when…

#7 Great Reisen Labyrinth

Along with Shea, their new party member, Hajime and Yue head towards the Reisen Gorge, where a rumoured labyrinth lies within. Stumbling upon the labyrinth’s entrance by accident, the party begin their exploration. However, their path is hampered by the traps set by the labyrinth’s owner, Miledi Reisen. After overcoming the obstacles, something enormous awaits beyond…

#8 Reunion With The Past

After conquering the Great Reisen Labyrinth, Hajime arrives at the commercial town, Fuhren, and receives a request from the Adventurer Guild to search for a missing adventurer at the northern mountain range. The party stops by at the lakeside town of Ur and over there, Hajime unexpectedly reunites with the classmates who lost him at the Great Orcus Labyrinth…

#9 Dragon Slayer

In order to search for the missing adventure, Hajime’s party acted together with his classmates and Aiko Sensei.
The group then travels towards the northern mountain range based on the guild’s intelligence. At a site destroyed by monsters, Hajime’s party found the adventurer Will who is barely alive. As they converse, they learned that he was attacked by a black dragon. And on that night, a giant black dragon appears in front of Hajime’s party…

#10 The Goddess’ Sword

Hajime and party learn from Tio that the Town of Ur is due for an invasion by monsters. While preparing to fight off the impending horde, Hajime introduces Aiko as the Goddess of Fertility, greatly raising the morale of the citizens. Finally, they face off with the monsters…

#11 The Monster’s Day Off

After their victory against the monsters, Hajime and party are escorting Will back to Fuhren. To thank Shea for saving Aiko, Hajime invites her to a date at Fuhren’s tourists’ district. Amidst their date, Hajime senses a presence underground and proceeds to investigate the situation with Shea. Over there, they discover a merman child, Myu…

#12 A Looming Shadow

#13 The Best at Being the Worst

Hajime heads towards another town after receiving a letter from Ilwa. Over there, they encounter Hajime’s classmate, Kosuke Endo, who is searching for reinforcements to save his friends who are fighting demons in the labyrinth. Knowing that Hajime is now powerful, he asks for his help, but…