
A senpai and his kouhai had no contact in the past except for using the same train station to go to school, thus only meeting each other in the morning. One day, they made a promise: "A single question each day, and answer it honestly." "I want to know more about Senpai, and I would like to know what I don't know about Senpai. So let's ask each other one question a day—for a total of 100 questions." This is the story of two people who are slowly getting closer, one question a day. (Source: Kadokawa, translated)
Watashi no Shiranai, Senpai no Hyakko no Koto is a Japanese novel of 172,641 characters, with 7,628 unique words and 1,553 different kanji. Its difficulty rating on Jiten is average, 2.2 out of 5. The full vocabulary list ranks all 7,628 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.