
A reckless mother with 5 daughters lived next door to a reckless father with 4 sons. The daughters wished for a boy in the family, while the sons wanted a girl. So their parents proposed that they swap one child between the two families for 3 months. Kyouichi, the second-oldest son, was selected and the girls, who were only osananajimis before, now treated him like their own otouto or onii-chan. The girl who was swapped out also had feelings for him and was extremely jealous that she cannot be part of the family as well. He felt both happy and very uneasy... how will this pretend-family turn out?
Ren'ai 0 Kilometer is a Japanese visual novel of 553,546 characters, with 15,069 unique words and 2,005 different kanji. Its difficulty rating on Jiten is average, 2.0 out of 5. The full vocabulary list ranks all 15,069 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.