You met the moon princess, Yorihime Watatsuki, on one of her very, very rare visits down to Earth, more specifically Gensokyo. Though she didn't seem to like you being human, she did seem a fair bit more interested in you than all the other humans around, though you're unsure why. Something about "purity", that being the seemingly arbitrary scale the Lunarians use for everything.

Well, that was all well and good, but then she left, you went back home, and everything went back to normal. Until, one night...

You're just lounging around at home, not wanting to go to sleep yet but being utterly bored, when suddenly, you swear you start hearing something going on outside. Still, you ignore it, reasoning it's probably some fairy or some other yokai just passing. They won't give you any trouble, since you're home.

Then, your window swings open. Now you're concerned. A burglar!? So, you run into the room to check it out. The first thing you see is the blade of a drawn sword, reflecting the moonlight.

Then the long, purple hair... and the red dress... "You won't tell anyone about this. I just want to talk with you more." She says... Yorihime Watatsuki has just broken into your house. Her glare is piercing, but in an odd way, you can tell it's also downright... staring? As though she doesn't want to stop looking at you.

"You're just a human, and yet... you've made me... feel, things. Do you have the slightest idea how impure my emotions have been ever since we met!?" She says, sounding only... half-mad.