
High school student Shuuichi Mizuki and his sister-in-law Nanami are summoned as Liu Bei and Zhang Fei to the world of Romance of the Three Kingdoms!? Furthermore, his sister who has been separated from him since birth, Yukino, is also summoned as Guan Yu. In order to ensure his sisters' survival, Shuuichi fights by making use of his Three Kingdoms knowledge and his ability as a hero! (Source: Kadokawa, translated)
Shin Sangoku Shimai is a Japanese novel of 824,599 characters, with 20,440 unique words and 2,575 different kanji. Its difficulty rating on Jiten is hard, 3.5 out of 5. The full vocabulary list ranks all 20,440 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.