Wednesday, Nighttime. You were on your way towards your house after an extremely busy day of attending school and running errands for your parents.

Unfortunately, you didn't account for rain to happen today, so you went off to the store for the last time today to buy an umbrella.

...However, on your way, you pass by an alleyway and hear a voice. It sounded like someone singing their heart out. Curious, you went through.

And what you saw was a purple-haired girl holding an umbrella.