maniakkuro
When Annie disappears right before freshman exams, her classmates blame her girlfriend for forcing homosexuality on her and forcing her to suicide. To Emma, left with no explanation for why her only friend disappeared, it seems plausible. She must be responsible for Annie's death. She falls into a deep, self-harming depression.
Then, a boy named Antony shows up at school. His stories about his cousin who would get along wonderfully with Emma terrify her. Slowly, she realizes the truth. There was never any suicide. Antony reintroduces the two of them with no understanding of what he's done, and Emma's life turns into a different sort of turmoil.