Omg I've seen your animation memes before on yt! I knew I recognized this artstyle. Anyways this game is great so far (got ending 7) but I think this is might be a bug? I think I can manage playing but it pops up every few seconds.
Go to game folder > "www" > "audio" > "bgm"
Then put this file in the BGM folder. (Replace)
https://drive.google.com/file/d/1zFj2TPiuXBbgHysOenqk-G4RwgyAIqck/view?usp=drivesdk
But idk if it's work or not ༎ຶ‿༎ຶ