When the young Sejima Seiya tries to rescue a dog, the passing truck winds up sending him straight into a completely different world! In this brand new world of Laurentide, Seiya finds himself caught up in an ancient prophecy that someone from another world will arrive to father the legendary heroes that will end the wars plaguing the lands.

What is Seiya to do as key women from every major nation in Laurentide start accosting him for his baby batter in an attempt to ensure their nation holds the most influence over the heroes destined to be born?! Worse yet—even if Seiya wanted to avoid becoming a stud, it turns out that if he doesn't create a child to bind his presence in this new world, then he'll be pushed out of it and sent back to the moment of that fateful accident!

Luckily for the unwitting father of heroes, coming to this world has given him the power to know when a woman is at her peak fertility!