Storyline
Su-na, once a bright and adorable girl, locks herself alone in her room after her best friend's suicide. She starts to talk and behave as if someone else exist in her room, but never opens the door to anyone. Finally, her uncle brings his fiance, Yun-mi, a psychologist specialist in hikikomori (people who isolate themselves from society), and she finds Su-na's trouble has something to...
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