Doomsday Meal

At the end of the world, I inherited the orphanage at home and volunteered to become a guardian. I wanted to protect the last piece of pure land for mankind. This is what I thought. Who knows… "Hey, Ayu, do you want me to teach you a super powerful trick?" "..." "How about I go out and help you fight monsters?" "..." Until one day, I saw her kill dozens of monsters by herself I understand the truth! But how can a child be so strong!