On the day of his uncle Nakamura Kenta's funeral, the main character, Endo Ritsu, was told an extraordinary will. Half of his inheritance is left to Endo Ritsu, along with this key.

Thanks to his relatives who did not object to the will, Ritsu was forced to inherit the estate. Later, he takes the key to the mansion where his uncle lived before his death.

He finds a young man dressed elegantly in a maid's uniform in the empty mansion. According to the mysterious young man, his uncle had been working hard on robotics research before his death, and his uncle had created him.

Ritsu gives him the name “Sui,” as he says he does not have a name yet. Moreover, to register Sui for master authentication, a switch inside his body must be pressed, and the power source must be his master's bodily fluids....

Ritsu was begged by Sui, who was on the verge of running out of energy, to put his cock deep inside Sui.

"I can't stop the thrill...!"

"Please come so much inside of me...!"

"I'm so excited......I can't stop the throbbing...! I have to cover it..."

An android gets pleasured by his new master, and gets sloppy.

Enjoy sex with a very naughty housekeeper-type super masochist android.