When young lawyers Arou Bouya and Keita Daigo encounter a mysterious woman named Key at an amusment park, they are enthralled by her beauty and charm. However, when they learn that she suffers from amnesia they are compelled to help her. Before they know it, the unlikely trio is running a sucessful law firm!

Whether they're helping a young woman with an unlikely harrasment claim against her, an autistic boy whose favourite poem has been stolen by a famous songwriter, or an elderly couple being forced from their home, Arou, Ketia, and Key face every problem with a smile.

Even if it rains.