Botan teaches cello at the music school run by her husband, Yamano. Despite their age difference, they are a loving couple. One day, Asami, Botan's admired senior, begins frequenting the music school as a piano tuner. However, Botan is bewildered by his somewhat gloomy appearance. Asami relentlessly pursues Botan, eventually attacking her like a snake stalking its prey. And there, watching the scene unfold with an ecstatic expression, is Yamano…