Doona! is like a fanfic I would have read when I was 17 that I would obsessed over, rereading multiple time to relive it's beautiful written moments.
The drama does seems like an ode to Suzy; written by an obsessed fan daydreaming of an outlook from his mundane life. Despite the extreme implausibility of this scenario, all the relationships depicted in the drama are written very realistically. That's the charm of Doona!, you deeply empathise with all the characters, their deeply flawed personalities and their struggles to navigate through love and life. A beautiful story, wrapped in stunning visual cinematography.

Sidenote: While watching the show I kept wondering if this was a manhwa which it actually was, I am so glad for the rise of webtoon and manhwa. The best sprouting grounds for aspiring Korean story tellers these days!