R21 will be advancing the main storyline from where R20 left off until shortly after the recruitment day, which is enough to put two of the hentai scenes I have been planning for a while.
The rest of the development time will be focused on Achievement Scenes and, with some luck, Nekoya's as well.
Currently I have been doing all the backgrounds for the Hearth Mansion (Living Room, Hall, Bell's Room and Hestia's room which is shown in the preview above) and wrote a few scenes, including an achievement one which is only missing two new characters I will be doing next.
That will be next preview!