The ordinary life of 17-year-old otaku Hajime Nagumo is disrupted when he and his classmates are summoned to a fantasy world and tasked with saving mankind. While his classmates are gifted with impressive abilities useful in combat, Hajime is belittled for only gaining an inferior transmutation skill that lacks any real offensive power. During an expedition in the Great Orcus Labyrinth, Hajime is betrayed by one of his classmates, plummeting him to the bottom of an abyss. Though he survives the fall, Hajime is faced with menacing monsters and misfortunes that send him spiraling into a grim nightmare. Desperate to live and return home one day, he resolves to fight for his survival—only to meet an imprisoned vampire he names Yue, who is also seeking to escape the labyrinth. Taking an interest in him, Yue and a few others along the way accompany Hajime on his journey to find a way back home, while steadily transforming from commonplace to the world's strongest.

Arion is a young shepherd who lives in Thrace with his blind mother, the goddess Demeter. Their lives are peaceful until the day Arion's uncle Hades appears and lures him to the underworld, promising that there is a way to restore his mother's sight. To achieve this, Arion must kill the god who cursed her: Zeus, the king of Olympus. After years of training in the underworld, Arion—now a deadly warrior—embarks on his vengeful quest to slay Zeus. On his journey to Mount Olympus, Arion forges alliances with some unlikely individuals: the giant Geedo, the thief Seneca, and the mute maiden Resphoina. As he cuts a bloody path through a vast world of warring armies and mythical monsters, Arion begins to unravel the secrets of his lineage and the fate of the scheming gods.

It's time for fun at the beach! Check out all the girls from Arcade Gamer Fubuki in their swimsuits.

After the capture, Hajime was worried about the farewell to Myuu that would occur when the trip resumed. Hajime and his friends were talking about The Seven Great Legends of Erisen as a memory before they left for the trip, but all of them were missed. However, in the final seventh adventure, he encounters a mysterious giant creature and is blown into the world of a devastated city! Hajime, who started to search for the stray Myuu, fulfills a miraculous encounter there. (Source: Official website)