I've Been Killing Slimes for 300 Years and Maxed Out My Level S01E02 - Along Came the Daughters
Summary:
After becoming the strongest in the world before she even knew it, Azusa entered into a new lifestyle with her first pupil, Laika the dragon, and discovered fun and enjoyment in it that she hadn't known before. But then, one day, a young girl calling Azusa her "mama" shows up and proclaims that her younger sister wants to kill Azusa. But Azusa has no memory of giving birth to these two girls, or of becoming a mother at all...
I've Been Killing Slimes for 300 Years and Maxed Out My Level S1E2 Screenshot