Synopsis
One day I woke up and my little sister had become two people. I didn't even have time to figure out why before she started doubling again. Every single day, another Ai. I scrambled to fix things, tried everything I could think of, but each day came and went and nothing worked. Then on the fourth day something changed. A new Ai appeared — not the loud, cheerful one I was used to. This one was quiet. Sharp. She called herself "the 16th Ai," and she said she knew how to stop the splitting. So we started working on a…
