Damn Zombies, How Dare You Disguise Yourselves as Little Girls

I was reborn. In my previous life, after the apocalypse began, I rescued a little girl. She blamed me for not coming sooner to save her and her grandpa, and even said she'd get revenge when she grew up. I thought she was just a child who couldn't handle the shock and was talking nonsense. Who could have guessed that I'd dote on her like my own daughter, only for her to shut down the entire defense system at the Longcheng Base I protected while I was trying to break through to SS rank? That caused a wave of zombies to break in. Distracted, I was badly wounded, and she ended up killing me with her own hands.