When it comes to visual novels, the protagonist's girlfriend can be pretty much anything - a student council president, the president of the United States or even an alpaca. Compared to the latter, a mermaid doesn't seem like such a big deal.
My Girlfriend is a Mermaid?! originally launched in Korea exclusively for smartphones. This move to Switch comes with a variety of enhancements, such as a new scenario, Live2D animated character sprites and a new opening theme song.
There is no release date set for when My Girlfriend is a Mermaid?! will arrive on Switch just yet.