Ichiro Kuga is a manga artist struggling to support his two young siblings, and he's in need of an assistant. Shiori Goshiki wishes to become that assistant, but her background is unusual in more ways than one.

Rainy weather complicates plans for Shiori and the Kugas. When Machi and Fumio are down in the dumps as a result, Ichiro and Shiori get creative in their efforts to make the most of the day's disappointing weather.

The fated day arrives, the day when Ichiro and Shiori will annul their Engagement Pact. But there's a risk their feelings for each other will vanish in the process, and there's no way to be sure without performing the ceremony.

With the pact no longer hanging over them, Shiori and Ichiro are free to live and love on their own terms. But that doesn't necessarily mean there are no complications left to address.