Metropolis: I Can Go Back a Hundred Seconds

I have a childhood sweetheart, I am taller than her and she is younger than me. When I was twelve, she gave me a pocket watch. Later, because of an accident and the watch broke, she moved. Until one day, she came back, and the pocket watch became very magical. The pocket watch with the system activated can send me back one hundred seconds to the past. Relying on this one hundred seconds of going back to the past again and again, I solved a lot of troubles. Gradually, and because of this watch, I became a real boss! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.