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.
Well, the cartoon girl could be doing various things in the opera. Maybe she's part of the chorus, or perhaps she's the lead actress delivering a powerful solo. It all depends on the creator's imagination!
It's a captivating manga with an interesting plot. The story follows a complex relationship between the main characters and has many surprising twists and turns.