Erwin was suddenly terrorized by mysterious calls and texts stating Erwin's close friends in the past, precisely in high school. It seems like the mysterious figure is a woman because she is always upset and angry when Erwin approaches women. The mysterious figure is someone who once loved Erwin. He forced Erwin to declare his love for the mysterious figure when Erwin was invited to come to the haunted mansion. He would kill Karina if Erwin did not accept the mysterious expression of love. Erwin was forced to accept the love of a mysterious figure for the sake of Karina's life. But consequently Erwin should not approach Karina for even a second, because the mysterious figure hoped Erwin and Karina would end their relationship. To solve the problem, Erwin then took the initiative to reveal who the mysterious figure was. He tried to recall the past he had experienced when he was still in high school. Erwin finally recalled the figure of Murni who died hanging himself in the classroom
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