
Seiji is a normal male student without a girlfriend, except that he has strange dreams almost every day. One day, he was going to be reunited with his younger sister whom he haven't seen since they were small. However, not one, but five younger sisters were waiting for him! It happened that some incident caused the protagonists from different parallel worlds to disappear and their younger sisters went searching for them. All of them ended up coming to Seiji since he was the same as their brothers. At the same time, strange dimensional distortions started appearing around him, threatening the balance of all the worlds. How will he and his younger sisters confront this crisis?
Imouto Spiral is a Japanese visual novel of 876,707 characters, with 17,044 unique words and 2,087 different kanji. Its difficulty rating on Jiten is average, 2.5 out of 5. The full vocabulary list ranks all 17,044 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.