Embrace Her Lust Understood by Cuckold Play v.1.0.1

As a popular erotic novelist, Raku Torase has been making a living with his writing. He pays a visit to
his best friend and owner of a hot spring inn, Gorou Torine, who he inherited it from his grandfather.
To Raku's surprise, Gorou asks for a favor. In his current novel, there is a scene involving cuckolding,
and Gorou wants Raku to sleep with his wife to gain a deeper understanding of the emotions of being cuckolded.

Although slightly taken aback by this unexpected request, Gorou becomes intrigued by Raku's wife, Haruka Torase, after seeing her picture on Raku's smartphone. With the condition that Gorou takes no responsibility and that Raku approaches the situation seriously, Raku agrees to fulfill the favor.
Time passes, and it's now summer vacation. The kindergarten where Raku and Haruka work is on a long break, so they decide to take a rest and visit the hot spring inn.
Haruka had reservations about the cuckold play, but on the night they arrive at the inn, something unexpected is revealed that neither Raku nor Gorou anticipated.
Over the course of 40 days spent at the hot spring inn, the conclusion of the lascivious days surrounding the busty married woman will unfold.