
Hisao Nakai is a normal high school student, currently in his final year of high school. One day Hisao finds an anonymous letter in his math textbook, directing him to meet the sender at a given location. The sender turns out to be his crush, however, as she confesses to him, he suddenly collapses. He awakes in a hospital bed, and is told by the doctors that the reason he collapsed is due to arrhythmia, a rare heart condition that causes his heartbeat to sometimes become irregular. Due to this, his parents have enrolled him in Yamaku, a school for (physically) disabled students.
Katawa Shoujo is a Japanese visual novel of 1,073,782 characters, with 18,958 unique words and 2,056 different kanji. Its difficulty rating on Jiten is average, 2.7 out of 5. The full vocabulary list ranks all 18,958 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.