(Katekyo Hitman Reborn) The Yandere's Locked Room

A Mary Sue heroine turns dark for love and becomes entangled with a member of the Space-Time Commission, a quick transmigrator.

Elena, the Ninth's adopted daughter, XANXUS's sister in name only, and the designated fiancée of the Tenth.

Nan Qing, who has the ability to feel what others feel, is utterly indifferent. Her disregard for the Mary Sue drives her to turn dark.

Also known as: A Book of Nan Qing

Content warning: The love interest transmigrates into a woman's body.

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