In an era of peace, within the majestic and solemn capital, the two major yakuza families—the Mizutani Group and the Yoshida Family—wax and wane, locked in an endless power struggle. Shizuku, the eldest daughter of the Mizutani family, serves as the private tutor to Princess Oshima, the shogun's daughter, gradually strengthening her family's influence through education. Naturally, during this time, conflicts with the Yoshida Family, led by the carefree young heir Harunosuke, are unavoidable. Meanwhile, to ensure the princess focuses on her studies, the shogun issues a ban on the sale of sweets within the capital, causing widespread discontent among the people. One day, Shizuku accidentally falls into a river and is rescued by Harunosuke, who happens to be passing by. The two young individuals begin a pure-hearted relationship, and the dynamics within the capital seem to quietly shift as well...