This new sound track for-Sakuya Izayoi Gives You Advice And Dabs.
It is not official. This is my personal change.

The new sound fixes issues such as:
1. Sudden and abrupt appearance of the sea sound.
2. The lack of a seamless repeat of the sea sound
3. The hum of industrial plants, workshops, machines, or something similar.

Download.
You can download the files from this link:
https://drive.google.com/file/d/1bQRqCMa1p03mLIR-dtHjgbolNfqNMXcV/view?usp=sharing

Installation.
Drag and drop files from the archive to the "audio" folder and replace the old files with new ones. Way-
\SteamLibrary\steamapps\common\Sakuya Izayoi Gives You Advice And Dabs\game\audio

My comment.
Unfortunately, the sea sound was not suitable for a calm relaxation in the game.

Most likely, you felt the same problems:
1. Sharp start and end of the audio track. This sharpness creates a sense of instant appearance on the shore. (Ding* And you're on spawn!)
2. There is no smooth transition from the end to the beginning. This effect, sharply disrupts the cozy atmosphere.
3. Constant industrial hum. It feels like the beach with our heroine is located next to the Kappa factory. (the hum is clearly audible when you increase the volume)

Because of all of the above, I decided to fix everything by finding a suitable sea sound.
The sound was selected specifically for this game, because the game does not have a smooth transition effect. Its standard sound is cut off and played back in spurts.

All these problems are taken into account and now you can enjoy the smooth and calm noise of the coast together with our cute heroine.
I wish you a pleasant stay!