Manyuu Hikenchou is a Japanese anime series set in an alternate Edo period where breast size determines social status and wealth. The story follows Chifusa Manyuu, a skilled swordswoman who rebels against her clan's oppressive rule. She embarks on a journey to change the rigid societal norms, using the secret sword technique to remove and transfer breasts. The series is known for its action, comedy, and ecchi elements, exploring themes of power and individuality.