​In a world devastated by the deadly Man-Killer Virus, Mizuhara Reito awakens from a five-year cryogenic sleep to find himself amidst a sex-driven society after losing Tachibana Erisa, the love of his life. As one of the few remaining males, Reito is sought after as a valuable resource for repopulating the world. Alongside four other attractive men, he is tasked with impregnating as many women as possible. Despite the temptations surrounding him, Reito is determined to resist and embark on a quest to find his beloved Erisa, who vanished three years ago. Will he be able to resist the allure and reunite with his one true love?​