Yamahime Anti-Mnemonics

is a Japanese light novel series written by En Mikami, with illustrations by Yuu Kamiya. The series began publication on August 10, 2005 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
A mysterious beautiful girl, Midori Yamahime, appears in front of an ordinary junior high school student, Kazuki Shinohara. She fascinates men and calls herself the descendant of the "Yamahime Clan" who manipulates her memory, and is said to have chased her sister, Fuka, who escaped from the village of Yamahime. Fuka, who has no common sense and has an unusually strong belief, thinks, "To solve people's worries, you should get rid of unpleasant memories." The memory of the people in the town is dangerous as it is! Kazuki searches for Fuka with Midori, but Fuka is known for the "worry" that "I don't like cleaning the toilet in the apartment", and all the memories about the toilet are lost.