
Takuya Kirishima is a brilliant young surgeon who can save anyone with a disease. He spends his days working with his childhood friend Seri Sasaki, who is a nurse in the same hospital. One day, a murder is commited in the hospital and people starts suffering a strange disease not seen before. Takuya starts looking for the answer of these strange happenings so he can protect Seri.
21-TwoOne- is a Japanese visual novel of 233,212 characters, with 8,722 unique words and 1,782 different kanji. Its difficulty rating on Jiten is average, 2.6 out of 5. The full vocabulary list ranks all 8,722 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.