The hit light novel series Backstabbed in a Backwater Dungeon, which has surpassed 4.6 million copies in circulation, is officially getting a TV anime adaptation set to premiere in Fall 2025. Alongside this announcement, a teaser visual, teaser PV, and main cast information have been revealed all at once.

From Betrayal to Vengeance: A Dark Fantasy Unfolds

Light is a young boy from the Human race—the weakest and most mocked among the nine races created by the goddess. After joining the elite adventurer party “Gathering of the Races,” Light is betrayed and abandoned in Naraku, the most dangerous dungeon in the world.

Miraculously surviving, Light discovers the true power of his rare Gift: Infinite Gacha. With it, he summons powerful allies, including his first draw—Mei, a Level 9999 maid and ultra-rare searcher. Together, they begin their path of revenge, building the ultimate kingdom from the depths of despair.

Light will be voiced by Nina Tamaki
Mei will be voiced by Ikumi Hasegawa

Special Campaign on Official X (Formerly Twitter)

To celebrate the anime’s reveal, a follow and repost campaign is underway on the official X account. Ten lucky fans will receive posters featuring the teaser visual, autographed by Nina Tamaki and Ikumi Hasegawa. To enter, simply follow the account and repost the designated tweet.

With its gripping revenge tale, powerful characters, and high-stakes fantasy, Backstabbed in a Backwater Dungeon is shaping up to be one of this fall's most talked-about anime series.

Teaser PV of Backstabbed in a Backwater Dungeon

Source : ORICON NEWS