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In this Mature-rated manga series by the creator of Cat in a Hot Girls' Dorm, journey to the fictional "Ero" period of Japanese history, where sexy ninja battles await! In the bustling city of Ero, danger and excitement lurk around every corner. Arakusa, a young woman in ninja school, hasn't even completed her training when she is called upon to serve the shogunate-doing everything from fetching his favorite erotica manga to facing off against an orgiastic church of Western invaders!