When Ren Kaito regresses ten months before the zombie apocalypse, he knows he can't just survive—he has to thrive. Leveraging future knowledge, he dives into high-risk investments, amassing a fortune to fund his survival preparations. He transforms a factory into a fortress, gathers essential supplies, and unlocks a powerful system that makes him nearly invincible. As he builds his empire, he also attracts a growing number of women, forming a unique and complex harem. But with the apocalypse looming, Ren must face not only the undead but also rival survivor groups and the emotional challenges of leading a growing community
