
Kouichi has looked forward to becoming a high schooler for one reason: to help continue his grandfather's coffee shop. But on the first day of school, a strange girl wearing an eerie mask tells him that she has come to take his life. She tells him that the heart beating within his chest is her own, and that she is an alien invader who has come to take over the world.
Hitoribocchi no Chikyuu Shinryaku is a Japanese manga of 185,684 characters, with 8,768 unique words and 1,737 different kanji. Its difficulty rating on Jiten is average, 2.6 out of 5. The full vocabulary list ranks all 8,768 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.