Goshujin-sama, Koubi no Jikan desu.

I'm a failure as a father, but this immoral sex feels so good!

Single father Harold, a closet pervert and masochist, one day has his secret stash of sex toys discovered by his new servant, Morris.
They soon begin a physical relationship, having sex at every spare moment all over the mansion.
As Morris awakens Harold's most perverted instincts, eventually Harold's son finds himself embroiled in their play as an unwitting witness to their exhibitionist antics, as Harold's masochism fully blossoms in the glow of immoral sex.

Official Translations:
English, Korean