What is summoned to another world again release date?

As an AI language model, I don't have access to real-time information and cannot provide up-to-date information. However, as of September 2021, there has been no official announcement regarding a release date for Summoned to Another World Again, whether it's a new manga series or a new season of an anime. Fans and readers of the series should keep an eye on official announcements from the creators and publishers for any updates regarding the release date.