Norn studied in the library information about the “King"s Vesse”, which Misha mentioned. The king’s vessel is able to enter into a state of estrus, without reference to certain days, and its seed has the power to cause strong estrus in females. Watching Misha’s behavior during estrus, Norn began to suspect that he himself could be this vessel of the king. In this world, due to the lack of males, females work and contain a family. Since it was difficult for Misha to cope with household chores alone, they decided to hire Misha’s childhood as a maid’s childhood girlfriend. When the quantity came, her charming appearance with fox ears forced Norn to perceive her as a younger sister. Norn liked when the quantity called him “they-chan”. The quantity changed and began to clean the house. Although Norn was a little disappointed that there was no mining uniform on it when he saw linen flashing from her skirt, he could not restrain his excitement ...