Danmaku Hop

in the game, you are Reisen Udongein Inaba, and you dodge knives until you get 100 score, in which you get to battle Sakuya Izayoi. Once Sakuya gets to 50 hp, a special dialogue with Flandre Scarlet is made:

"Flandre, what are you doing here?"

"I though I missed something. Why is Reisen here?"

"I was just minding my business, and then Sakuya here decided to attack me!"

"You came into the territory of the Scarlet Devil Mansion, why are you playing the victim? You rabbits arent't allowed in the mansion."

"Should I go or...."

"Yes."

Once Sakuya gets to 0 hp, she gets defeated and the epilogue starts.