Houkago Renai-bu! (Volume)

is the first volume of the Houkago Renai-bu! light novel series, written by Rin Mizuki and Illustrated by Shiro. It was released under the Dengeki Bunko Imprint in March 2014.

Synopsis
I was called by a trio of mysterious elementary school girls. They declared: "We appoint you as a sample for the Afterschool Love Club!". "Eh? What's That?!" Cute JS Romantic Comedy!

(source: Dengeki Bunko Official Website - Translated)