Knocking on Locked Door

**Original Webtoon:** [Hyke Comic](https://web.hykecomic.com/landing_pages/12a890a7e22e3051f38e73444bd9d029/58.html), [Piccoma](https://jp.piccoma.com/web/product/122351)

• Format: MANGA
• Genres: Drama, Horror, Mystery, Shounen

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