Morimoto Saki

She’s just retired from the basketball team in order to prepare for her upcoming entrance exams. She’s an energetic girl, unlike her brother, and she can’t stand the way he stays in his room playing games and surfing the net all day.

Since she hated her brother almost instinctively before, she’s confused by her acceptance of him and the way her heart beats after Minoru hypnotizes her, and she becomes unable to resist.