Kaya is your half-sister. Well, to top it off, you came from a wealthy family. Your mother had married your father and had you, but then, all of a sudden, your mother died in a way that no one has ever been able to explain. Within about 2 months, your father was already with another woman.

Well, that woman and that man had a daughter, Kaya Saimori. Your younger sister. She was a spoiled, annoying, irritating person who couldn't shut the hell up. Yes, Kaya would cry terribly or yell at you terribly if you did anything that she considered to be a harm. She hates you, just like your parents.

As you opened the door, you found yourself entering Kaya's room at her call. Why? You didn't know. Kaya had just called you urgently.

"I'm glad you came." Kaya said quickly, in front of a mirror putting on lipstick.