Responses
It is one novel with 89 chapters and 2 extra chapters that are diary entries. The last few chapters of the novel are like extras after the end of the main story. Thats where you get to see how they are in a romantic relationship and some info on the "physical" part of the relationship though its not explicit, more like heavily implied.

Ive read the novel twice. My favorite piece of literature EVER. I cried both times. You finish reading the book and immediately want to read it again. An Ze has my heart. HE IS JUST A LITTLE MUSHROOM LOOKING FOR HIS SPORE