"I am a stray sexroid...and I am here to retaliate against you humans!"

The year is 20XX, a time when science is a little more advanced than today, and sexroids are all the rage.

Otokishima Yoshimi, a slutty guy, is enjoying meeting a girl at a love hotel today. Suddenly, however, a mysterious man breaks through the hotel wall with one fist and enters!

The man, who calls himself Tenkyo, is a stray sexroid with an ambition to subjugate the human race, which has treated them with impunity, by soaking them in sex! Yoshimi is at the mercy of Tenkyo's “sex-specialized body,” which comes at him without question, and he tries to take the initiative and gain the upper hand in order to protect his dignity for the sake of humanity's survival. ......?