Koyuki's Echo: The Demon Slayer's Innocent Sacrifice
When eighteen-year-old Charm shields her Hashira brother from death on the Mugen Train, the Upper Moon demon Akaza recognizes her as his lost love reincarnated and takes her captive in exchange for her brother's life—forcing the innocent healer beloved by all the Demon Slayer Corps into a slow-burn romance with the monster who stole her freedom.
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