Kayano Kyouichi

Hime's older brother. He is very protective over his younger sister. He agrees to Reika's game to win 50,000 yen each time he is able to bring one of the sisters to orgasm or lose 50,000 yen each time he or Hime orgasm in order to save Hime from freezing in the outside cold.

However because Reika hypnotized him he always gives in to his desire and climaxes first. Reika also hypnotizes him to have sex with Hime, which he normally would never do because he values his sister too much and believes incest would hurt her.

When they lose too much money Reika confiscates his car and his laptop computer and forces him into employment as a butler.

Spoiler

Hitomi wants to run away from the mansion and begs Kyouichi to help her. When they are caught trying to wait for Hime they are punished.