
Amane lives alone in an apartment, and the most beautiful girl in school, Mahiru, lives just next door. They've almost never spoken—until the day he sees her in distress on a rainy day and lends her his umbrella. To return the favor, she offers him help around the house, and a relationship slowly begins to blossom as the distance between them closes... (Source: Yen Press)
Otonari no Tenshi-sama ni Itsunomanika Dame Ningen ni Sareteita Ken is a Japanese novel of 1,310,461 characters, with 19,902 unique words and 2,301 different kanji. Its difficulty rating on Jiten is hard, 3.4 out of 5. The full vocabulary list ranks all 19,902 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.