Isekai De Saikyo Mao No Kodomotachi No Mama Ni Natchaimashita

Story:

High school Akari mourns the loss of her mother. Mom died a year ago protecting Akari from the oncoming truck (accident). One day Akira discovers an adventure game that her mother got for her birthday some time ago. She had never had a chance to play it before. Suddenly, the girl was called to be the mother of ten Demon Lord children in another world…