The piano riff expresses the sadness of someone who is overwhelmed by despair and loss, and continues to lament in the endless rain. I think it suits extremely sad and serious images, such as scenes of eternal farewells and irreparable regret. It is also suitable for scenes that stir up fear, such as exploration and conversation parts in indie horror adventure games. For production purposes, the sound of rain is included as ambient sound, and noise tones are included to express confusion in the mind. It can also be used for stage and drama accompaniment.