Until the end, I still can’t differentiate which scene is a dream and which one is the r...

Until the end, I still can’t differentiate which scene is a dream and which one is the reality.
I like the art, the overall plot is also nice, but I’m pretty frustated with how every scene is executed. There are still some unanswered question, or maybe i just missed it. These uncertainty up till the end actually brings a sense of realism in the story, but alas, maybe this story is just not for me (︶︿︶)