
The game follows Masato Takahata, a high-school sophomore, living alone, going to school classes and working a part-time at Aqua Rouge cafe. The setting is in the near future with technological advancements, but the living style didn't change that much. One day you find a strange note with an address of a home page. You check it out only to see the ominous warning text. While you're not trying to figure out the mystery behind it, you will traverse town meeting various people, mostly girls and women, with whom you'll work on relationship to become friends with, or something more.
Mermaid no Kisetsu is a Japanese visual novel of 397,669 characters, with 10,687 unique words and 1,664 different kanji. Its difficulty rating on Jiten is easy, 1.9 out of 5. The full vocabulary list ranks all 10,687 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.