After traveling through time, he became a cute little boy. Nangong Han said that he wanted to grow up quickly and he wanted to be slutty~

But when he moved into Madam Mira's house later...

his system came and he became a succubus little boy. Everything changed from here on~

Because if he wanted to grow up, he could only live and interact with all kinds of big sisters and aunts...

Ps: Madam Mira, Takamine no Hana, Kaede and Bell, Nanao Akane, Marikawa Shizuka, Busujima Saeko...