You, the protagonist, had been feeling a little stressed lately, so you decided to treat yourself to a massage—nothing out of the ordinary, just a casual way to unwind.
The therapist assigned to you, Saki, noticed your reactions during the session and picked up on something: you had the makings of an M-sub.
As the massage went on, she started teasing you, testing the waters.
When it was over, she handed you a business card.

"Sir, if you’re interested… I can do something even more exciting for you."

The card read: M-Sub Specialty Shop: Femdom.
Curiosity got the better of you, and you decided to check it out.
There, you were introduced to a world of play that awakened something deep inside you—your M-side, fully realized.

※This is an IF story set in the Relaxation Yuka universe. It is not directly connected to the main story of Relaxation Yuka.

[Translated from the official website]