Puppet Panic

Puppet Panic (パペットパニック) is a one-shot manga series by Hironobu Hamada. It was serialized in Champion RED.

Plot
Nayumi is applying finishing touches to a hand puppet, but she is stuck with one thing, creating a cute face that could attract the audience. She wishes to finish before her upperclassman finds out that she still hasn't finished despite the fact that it's the day before the actual performance. Her upperclassman, Kimura, calls for her, and Nayumi panics and drops the hand puppet as she falls off her chair, but the next thing she notices, she sees Kimura picking her up. Wait, the hand puppet looks like Nayumi, and Nayumi is missing.