“This me becoming your wife… How many children do you want?” Ten years ago, Junpei became completely alone after his father disappeared and his mother passed away from illness. Since then, he has lived by himself, keeping his distance from those around him. One day, he returns home to find two strange women fighting inside his house! Alice, an elven princess, and Mei, a dwarf princess, claim to have come from another world. They reveal that Junpei's missing father was a hero from their world, and they want Junpei, his son, to marry one of them and become the king of their world. Junpei immediately refuses, unwilling to be used for their purposes. But when the portal connecting the two worlds mysteriously disappears, an accident causes his home to explode. Before he knows it, Junpei ends up living together with the two incredibly forward princesses from another world—whether he likes it or not!