I'm not sure. It could be based on real events, but it might also be fictional. You'd have to do some research or check the author's notes to know for sure.
As I don't know the details of the 'filosofi kopi' novel, I can't say for sure. But given the name, themes could potentially include coffee culture and philosophy.
The 'filosofi kopi' might be a relatively unknown novel to me. However, generally, a synopsis would include the main characters, the central conflict or theme, and perhaps a bit about the setting. Without having read it, it's hard to be more precise.
A cartoon dog with bags under eyes could mean that the dog is overworked or has been having trouble getting enough quality sleep. It could be a way for the artist to show a more vulnerable or worn-down side of the character.