In the recent October release of Kadokawa’s Monthly Comp Ace magazine, it was revealed last Friday that the manga adaptation of Usber and Hana Amano’s light novel series “I’m Not the Hero!” (Shujinkō janai!) will conclude in the upcoming issue on September 26.

The manga, penned by Meiji, made its debut in Monthly Comp Ace in December 2020. Kadokawa has previously published the manga’s initial compiled volume in May 2021, followed by the fourth volume in December 2022.
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The original light novel series is distributed by J-Novel Club, and the premise is described as follows:
In a tale featuring a middle-aged Japanese salaryman, a schoolgirl, and a speedy truck driver, a rescue attempt unfolds. As you might guess, I was that man attempting the rescue – though “was” is key, as the story swiftly transports me into the realm of my beloved game, Braves and Blades, with the character Rex Tauren.

Rex, an adept level 50 all-rounder, boasts abundant class skills but grapples with a major flaw – being a minor character, his growth dwindles post-tutorial, rendering him almost useless.
To clarify, my new quest entails pinpointing the real protagonist of BB and passing on the weight of world-saving endeavors. My desire? Just to relax and… Wait a second! Why does everyone persistently label me as the hero?!
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Usber initiated the original light novel series on the Shōsetsuka ni Narō (Let’s Become Novelists) platform in January 2020. Kadokawa brought forth the inaugural light novel volume, adorned with Amano’s illustrations, in December 2020. The third volume followed in May 2022.
Source | Monthly Comp Ace October issue