After a sudden tragedy claims her parents, Noelle turns to her returning stepbrother Shuuichi for support during her grief. On the night of the funeral, however, his unsettling actions leave her questioning everything she once knew about him. Without explanation, he insists she transfer to the prestigious Takamine College, where he begins pressing her for details about certain students on campus. As Noelle adjusts to this new chapter, she senses his inquiries are driven by a deeper purpose tied to his own past.