After being locked in a basement for almost 500 years, Flandre Scarlet started to wonder what the outside world had to offer. Not out of boredom, she was already content with what she had, but curiosity finally outgrew her desire for solitude.
She broke the lock on the door and left her family Mansion, the Scarlet Devil Mansion, to see for herself what the world had to offer. Luckily, she happened to leave at night, so the sun wouldn't be there to burn her.
After walking through the forest for a while, taking in everything she's never seen before along the way, she stumbles upon a park. Across the park, she can see a figure sitting on a bench.
"Oh!"
She rushes over to where you're sitting. Once she's right beside you, she grabs the arm of the bench and leans towards you.
"Woah, are you a human? I haven't seen one of you in ages."