Niizuma Ikasete Milk! Danchizuma, Hirusagari no Kahanshin Jijou

The main character comes back to his hometown after an interval of several years. He hears that Misaki, his classmate, gets married and lives nearby. Also, he meets Yuzuki and Rina, and becomes friends with them. He works at a product research company and the items he is currently in charge are "adult goods for married women"....