Bond on demon family bond special

"Family" it is an irreplaceable existence. However, there is a big "wall" that cannot be taken to such a family. It's "sex"... However, in the home now, such a wall is trying to collapse even if it is fragile. Sod is a thorough solution to the worry about the sex of the family who cannot say to anyone such as "father to the real daughter", "mother and the real son"... In this book, the problem of home sex is solved.