
The protagonist has captured 4 women and confines them to an abandoned hospital in order to expose and condemn the crimes that they committed. These women are deeply involved in the deaths of his beloved younger brother and sister. However, they won't break so easily. If they don't want to be upfront, then he will get the information out of them. Interrogation, torture... using any means possible to punish them thoroughly.
Zen'aku is a Japanese visual novel of 476,449 characters, with 11,184 unique words and 1,900 different kanji. Its difficulty rating on Jiten is average, 2.4 out of 5. The full vocabulary list ranks all 11,184 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.