I don't yet have a set date for when it releases, sorry! Working on it as much as I can.
As for the content, there are 3 parts of content to the update. The two main characters, the cafe girls and unannounced content. There will be 3 test phases to be done before the full release,one of which is done and we're working on the second one now. You can always find more information on the game's Discord. Hope that helps! :)