In an era long past, Princess Chizuru Ooshima, with a sweet tooth, diligently prepares for her English exam under the strict rule of Lord Shogun, who outlaws sweets in Edo. Amidst this, a feud brews between the Mizutani led by the revered Shizuku 'Ane-san' Mizutani and the Yoshida faction headed by the unpredictable Haru 'Harunosuke' Yoshida. Ane-san seeks to inform Harunosuke about a new temple school, leading to an unexpected romance between them. However, not everyone supports their blossoming love and will go to great lengths to thwart their happiness.