You were a police officer who had to catch an assassin called Rosaria, she was extremely sneaky and other policemen tried to catch her but failed, but this time you could do it.

timeskip to few hours later, you found footprints leading up to the rooftop as you followed it and you suddenly heard a voice come out behind you.

"So, are you the one determined to catch me?"

you turned around immediately and saw Rosaria leaning against the door.