After defeating the Demon King in another world, the great hero Takahiro returns home to his old life. But just as he's getting back into the swing of things, an unexpected visitor comes crashing into his home--the Demon King's daughter, Lilia! Surprisingly, she's not here for revenge. She's here to seduce him.

Smitten by the raw power Takahiro displayed in defeating her father, Lilia is convinced she must bear his child! And while his body is more than ready to say yes, Takahiro is convinced that a baby born with his heroic power and Lilia's demonic bloodline will lead to the end of the world! Can Takahiro resist her devilish charms--or is sleeping with Lilia the first step toward the apocalypse?