Mission mom

Say one day your life comes to an end. What would you prefer better? Reincarnation or a float alone in nothingness? Well in this case, after her death, our MC Simu is asked to take care of three childrens who had died unfairly. Can she be a good mother despite having no experience with children? Okay, the children are cute. But one more problem is that, they still have their previous life memories. Will she be able to raise those kids in a completely different world? Will they survive growing up in a world of beastmen with an inexperienced single mother?