The Demon King, once hailed as the "strongest" for ages, grew weary of his existence after repelling countless heroes who challenged him. Finally, he plunged a sword into his own heart—only to wake up a thousand years later, reincarnated as a human baby! Now reborn as Zeon, the former Demon King fully intends to enjoy his new life as a human peasant. However, through a strange turn of events, he ends up being officially recognized as the Hero of this era?! The tale of a reincarnated Demon King’s unrivaled Hero saga begins!!

Karin Kirisaki was raised by a secret organization to be a cold-blooded killer. One day, she was given a mission to kill a manga artist. She was just trying to get the job done, like usual, but then she happened to read *Tokimero*, her target's serialized manga! It rocked her world and made her yearn for a heartwarming adolescent school life! Karin immediately quits her job as a hitman, and for the first time, she can enjoy life as a normal high school student, but the organization won't let her go so easily... A youthful adventure about putting your life on the line, to kill or be killed! The start of a slice-of-life assassination romantic comedy! (Source: Shonen Gangan, translated)