DNA²

In a future overloaded with humanity, a specialized agent is sent back in time to prevent the birth of a man whose DNA will lead to catastrophic overpopulation. Assigned to eliminate the "Mega-Playboy," he quickly identifies the target: a seemingly ordinary high school student named Junta. There's just one problem – Junta isn't quite the Casanova the future reports, and a slight miscalculation in the agent's plan leaves him with an unexpected, and rather inconvenient, allergic reaction to potential love interests. Now, with every beautiful girl sending him into a transformative, lecherous frenzy, Junta finds himself at the center of a burgeoning harem he never asked for, all while an agent from the future struggles to correct her blunder. What started as a mission to save the world from excess quickly devolves into a hilarious, fan-service-filled scramble to control Junta's involuntary transformations and prevent the very future they're trying to avert.

✦ AI-drafted summary