Mamagoto ~Mama to Naisho no Ecchi Shimasho~

The main character returned to his parents' home after university, but there is awkwardness with his family because of his long dormitory life.
He shared it with his mother's senior and neighbor, Kyoko Kawashima, but she actually wanted the protagonist to be her own son. She set up naughty skinship in form of advide to dazzle the protagonist.

However, his mother, Chikage, notices it and desperately tries to shorten her relationship with her son. So that Kyoko won't steal her son from her. But Chikage got too excited about her own son.

In addition, his tsundere's younger sister Aki and Kyoko's daughter Yuma participate in the battle, and the kinky family's skinship around the hero begins!