
One day, when they happened to be alone in the classroom after school, Nakaba Masaki suddenly confessed love to his classmate, Yuzuki Tsubasa, He was prepared to be crushed by her words of rejection, but what he received was a surprising reply: "I'll go out with you, if you'll play along with two-timing with my twin sister." For a moment, he didn't understand what she was talking about, but he knew he couldn't pass up this opportunity, so he agreed to go out with both of them at the same time. But even more unexpected events awaited him! (Source: Brave Bunko, translated)
Suki na Ko ni Kokuttara, Futago no Imouto ga Omake de Tsuitekitta is a Japanese novel of 188,190 characters, with 7,290 unique words and 1,503 different kanji. Its difficulty rating on Jiten is easy, 2.0 out of 5. The full vocabulary list ranks all 7,290 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.