義祖母、調教中。～仲良しの秘訣はSMです。～（Gisobo, Choukyou Chuu. ~Nakayoshi no Hiketsu wa SM Desu.~）

"S-Stop... Doing this..."

"What are you talking about? There's no way I can stop now."

The woman, who appeared to be in her late forties or early fifties, was lying on my bed. Her wrists were tied to the bed with leather handcuffs. She tried her best to squirm, but she couldn't escape. Even fully clothed, her voluptuous body writhed seductively. Her name was Hashimoto Ryouko. And she was my grandfather's second wife.

With my secret exposed, my mind goes out of control.
Before I knew it, I had pushed Ryouko down on the bed and put the leather handcuffs I had been holding on to her wrists.
I had grabbed the leather handcuffs while trying to hide them, but I ended up restraining Ryouko with them.

I was surprised at how excited I was.
My manhood was rock hard inside my trousers, thrashing about with such force that it looked like it might break through the fabric.
I then unzipped my trousers and pulled out my manhood.

"This is what I've become in front of you, Ryouko, who belongs to me. I'm going to make you take responsibility for this."