oh my god this is the beach episode ðŸ˜
These things could be AUs, like, the shorts smoke room did a few times.
Technically speaking, it wouldn't be the beach episode, it's more like it's set in an onsen. However, I don't think I understood your answer well, I apologize.
AU stands for Alternative Universe. Usually people write these for fun, outside of canon material, as a bonus.
