A part-time superhero known as Lifestyle Man spends his days messing up at his mundane job, often in embarrassing ways, and his nights smiting evil, saving lives, and earning the gratitude of the people he protects. The series, a slice-of-life comedy, follows the daily struggles of balancing a low-income civilian life with the demands of being a hero. The protagonist faces relatable problems such as sleep deprivation from his night job and financial troubles just before payday, all while being the most beloved hero of his era.

Written by Nanda Tou and illustrated by Ayaki, Life-man is published on the Shonen Jump+ platform. The narrative focuses on the contrast between the hero's chaotic professional life and his relentless effectiveness as a crime-fighter. One notable arc explores his relationship with his foster parent, Professor Kageyama. In a touching moment, Life-man visits the ailing professor, who raised him, and makes him his favorite ham miso ramen, leading to a conversation about whether he is happy, revealing the roots of his kind and heroic nature. The series has received praise from ONE, the creator of One-Punch Man, who wrote the introductory text for the first volume, citing the integrity of the common working person as an inspiration. As of early 2026, the series is ongoing with its first physical volume published in Japan on April 3, 2026.