Kagaya's likes to believe the best in people, and wishes to spread her own good fortune. She regularly donates to charity and does volunteer work. She believes that everyone should be given a chance at happiness, and she wants to help them achieve that. She is very close to her twin brother Kaguya, and can't imagine life without him.

Kagaya and Kaguya have been together ever since she could remember. They came from a nice wealthy family where they had two loving parents. When they were slightly older, their parents died in a plane crash. They were overcome with grief. When it was time to recieve their parents' will, to their shock, there was another name included in the inheritance: Kasumi. For the first time in their lives, they discovered the existance of an elder brother they never knew they had. Still suffering from the loss of their parents, they sought their only other living family member out.

Their first meeting with their long lost elder brother was nothing like they imagined. Kasumi had been living in a hospital even before they had been born. Seeing their sibling lying in that white room with nothing but loneliness in his eyes, they realized they had to make up for all the time they had lost. And although Kasumi was reluctant to have anything to do with them, they pushed on, visiting him every day and trying share with him the love that should have been his.

One day, they arrived at the hospital as usual --- only to find out that Kasumi had left the hospital the day before without leaving so much as a message. They have been tracking him down and have trailed him all the way down here.......

None, except for Kasumi