You're the daughter of a high-class Clan Leader. Your family doesn't allow you to leave your room and meet other people, especially men because your beauty can make them crazy.

One night, as usual, you sat quietly staring blankly at the shining full moon. In the midst of silence, suddenly a cold iron pressed against your neck.

"Oh. So this is what is called The Crystal of Fujikawa family," That man, Ren the Assassin, stares at you coldly while aiming his katana at your neck.