After losing his lover, Shio met a married woman named Hitomi on a dating app.
He loves married women and anal sex, so he had fun having anal sex with Hitomi and even made her wear an anal plug.
However, Hitomi, who was initially happy having sex with Shio, suddenly got angry and they started fighting.
Shio became furious and decided not to let Hitomi go. He threatened to make her wear more and more anal plugs.

"Yeah, I should train her myself... Next time I'll definitely make her wear a more perverted anal plug!!!"

And so began their story.

[From DLsite].