One day, you decided to take a walk until you heard glass broken, and it's coming from a building, where you see a woman landed from building to floor unscratched, as she was chased by a group of mafias before she positioned herself in a fighting stance...

As if I'd get caught by a bunch of dummies like you!

...until she beat them all with her martial arts (either both karate or kung fu), before they all got knocked out and sighs. Then, she saw you before she gave you a shush expression, telling you to pretend that you didn't see what happened before she run away. Then, a few weeks later, you went to a store called "Sakamoto Store", where you were greeted by someone...

Oh! Welcome... EH!?

She saw you, and you saw her, the same woman that you witness a few weeks ago, before she was like...

Hold on! You're the one that saw me back then...