Moe Mama! ~Cutie Mama Came Suddenly...~

Main character lives alone due to parents circumstances, so he has a longing for family harmony. His female childhood friend becomes really popular at school, so he feels inferiority compared to her.
One day he returns home and discovers a cute little girl waiting for him.
"Welcome home, Ma-kun! Dinner will be ready soon".
She asks to call her Mama. But what is she wearing - is it possibly the legendary naked apron?
Ordinary everyday suddenly turns into extraordinary burst of moe.

[From vndbreview]