Protagonist Serisawa Seiro is an otaku and doesn't have any friends, the class caste is fairly low. When the group division of the school excursion that came close in a few days he alone was left out. It was put into the team of a nagging chairman, and free movement was decided to go to the museum.

But shortly afterwards, it is attacked by sudden dizziness... It is transposes to another world very much. Though it looked like my world, the alternate world had reversed the chastity idea there by men and women!

Changing until yesterday, Seiro being treated like a beautiful girl and is pampered. First though it was puzzled, it is hit on to use the situation before long.

[Chairman, Changing of destination of free activity. Because you may have sex as me.] [Really good!]

A convenient asking is realized and the male virgin is lost. Furthermore, the bad girl duo who witnessed the spot threatens it.

[If it doesn't want to be exposed by you, have sex.]

Reverse raping delightedly instead!?

The free activity is a love hotel, it is female teacher and returning to the inn 3P, with the mother and daughter bowl in the landlady and daughter, the school excursion is erotic smeared!?