Lilia Pregnant The World End

Takahiro, the hero who defeated the Demon King and saved the parallel universe, has now returned to the real world. But one day, just as Takahiro was starting to return to a peaceful life, the Demon King's daughter Lilia comes to him. Thinking she's out to exact revenge on him, Takahiro readies himself for battle. But then he finds out that because he's really strong, her goal is to give birth to his child...?!