Mana vecmāmiņa kiborgs

My name is Kim Yuna. I was born from the cloning of my mother's genes, and I also ended up in a major disaster. From now on, I have to live in a small town in a house with my grandmother, away from my mom, who will soon go to Mars. There’s nothing unusual about this, because my grandmother is just an ordinary grandmother: she goes to department stores, cooks a lot and deliciously, and protects me from any danger in every way she can. Except for one small "but": my grandmother is a cyborg.