The acclaimed composer Shu Ooka has a passionate relationship with Shizuka, his older cousin who possesses a commanding presence. They lead an adoring life with their son Botan, yet their peace is disturbed by their neighbor, Ryujin Takamura. This well-known stage actor is determined to win over Shizuka's affection, and his talent for portraying romantic personas only adds to the challenge. Shu and Ryujin have been rivals since their school days, and Shizuka's assistance with Ryujin's daily duties only fuels Shu's jealousy.