J.Q.V 人類救済部 ～With love from isotope～

Mankind has vanished.
Uninhabited town, uninhabited school, uninhabited classroom.
In this world where no other humans exist Shimaji meets a young girl. And from this girl flows words that don't fit this world "I will make a club" A club to save mankind. But in this world where humanity doesn't exist anymore, who can be saved?