A collection of stories:

1-3. Wife Development Club

4. Toilet in Fairy
   The apartment manager has to pee, visits a public toilet and catches some random woman shlicking in the men's room. She claims to be the toilet fairy and takes her "duty" very serious.

5. Bursting Housewife
   A sexy wife with a younger (?) husband has a clothing accident (jeans ripped open by her fatter then before ass) and a post man is too ready to take care of her sexual frustration.

6. Pretty Face!
   The stunningly sexy Makoto looks after the young Ruma, while her husband is working overseas. She makes him dress girl's clothes, discovers his unnaturally big wang and uses it right away.

7. Closet!
   Kyouhei got dumped and threatens to become a hikikomori (a person who becomes pathologically reclusive and refuses to leave his room, house, etc) or even to commit suicide. Kana, his sister, wouldn't have any of this and heals his depression through the most effective medicine in hentai manga: sex!

8-10. My family's Rape Plan
Takumi comes home after five years, to find Maika, his older sister (who grew up to be really, really sexy in the years of his absence), prancing around naked in the house. Later she drugs him with an aphrodisiac to introduce him into a family tradition: Incest!

11. Welcome to the Wife Development Club!
    The apartment manager and the three unfaithful wifes from one through three to make a film, but it threatens to become public.