This is a piano music about rain.
Different people, different time, different mood, have different reactions to the rain.
The summer rain comes in time. The rain in winter brings cold.
It’s raining in spring. Autumn rain seems to have mood.
The music uses a lot of chords that sound incongruous. It always gives people a feeling of instability and wobble.
It can be matched with the fluctuation of psychological mood, inner anxiety, thinking, the hustle and bustle of the city, thoughts at night, etc.