Upgrading From the Cat Robot

My name is Gen Seita, I'm 11 years old, and I'm a transmigrator with a cheat. I have a cute little sister named Gen Shizuka. I currently live in Tsukimidai Town, Nerima Ward, Tokyo, Japan. My days are peaceful and comfortable. I thought life would continue like this, but a figure I saw in a piano competition made me realize the truth of this world. This isn't the world of Doraemon, but a world fused with countless different anime. To survive, to protect my lovely little sister, I, a lazy person...