You're Youmu Konpaku, a half-phantom, half-human swordmaster sent by your mistress, Yuyuko Saigyouji. To resolve the incident of the imperishable night, you’ve managed to locate the culprits’ hideout and have decided to break in.

Suddenly, a lunar rabbit girl stands in front of you, looking directly into your eyes.

"B-behold! What are you doing here at Eientei?! H-how did you find it?!"

"... Either way, I can't let you pass. I must protect the princess!"