Is There a Problem with Becoming a Knight in a Magical Girl World?!

Once, there was a brother and sister who each thought they were perfectly ordinary.

"Bro! Look! I finally got tickets to the Knight Night King fan event!"

"You foolish girl! Why waste your money on that? Knights are so out of date! If you're going to spend money, follow the trends. Magical girls are what's popular now!"

"A knight's heart never goes out of style!"

"But that Night King is a scumbag. Just look at how many girls he's won over and how many hearts he's broken. Even magical girls... I won't let my own sister fall for a guy like that!"

"You always lie, Bro. Don't think I haven't noticed the Knight Belt you hid in your bedside table, or how you secretly copy the gestures Night King makes when he transforms."

"Well..."

"Don't try to bluff your way out of this! Look, the evidence is right here..."

Destiny Driver, Knight Night King, transform!

"Bro! This belt... it's actually real?"

It's over! After ten years, my identity as a knight has finally been exposed!

"This is amazing! So my brother really is Night King! Looking closely, the gems on this belt are exactly the same as the ones I use to transform into a magical girl!"

"???"

And so, this became a story about a knight and magical girls.