
Shinonome Hyouka and Mashima Iori used to be childhood friends, but Hyouka's attitude changed drastically some time during junior high. The sweetheart Hyouka started treating Iori coldly whenever they met. However, when another childhood friend, Ameya Hikari, starts to make moves on Iori, Hyouka's attitude towards Iori also begins to waver... (Source: GC Novels, translated)
Deretai Kanojo no Ura Omote is a Japanese novel of 115,666 characters, with 6,081 unique words and 1,491 different kanji. Its difficulty rating on Jiten is average, 2.5 out of 5. The full vocabulary list ranks all 6,081 words by how often they appear, and you can study them on Jiten or download them as an Anki deck.
Here are some of the words that appear most often in this media, as well as a sample of its rarer vocabulary.