
Reiji is young CEO of a first-class hotel. He is single and 34-years-old. Even though he has a good appearance and wealth, women eventually leave him because of his personality. He is generous with himself, but strict with others. For the first time, Reiji falls in love with someone. Her name is Misaki. Hoping to gain her love, he begins to change.
Sekai Ichi Muzukashii Koi is a Japanese drama of 98,295 characters, with 4,993 unique words and 1,241 different kanji. Its difficulty rating on Jiten is average, 2.8 out of 5. The full vocabulary list ranks all 4,993 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.