Kagura would be a year ahead of Yuki and Tohru, and Momiji would be a year behind them but it's possible we could put Kagura in her third year of university with Tohru and Yuki already in their second, with Momiji starting his?
Going by Japanese standards of universities, most students tend to have more free time as well as take up part time jobs since junior and senior high school was typically pretty rigid and restrained with personal time and hobbies, only making time for clubs/sports if not then study time. Since a university pretty much dictates what kind of employer will hire you, it tends to give students more free time to have fun now that the worst is pretty much over, academically speaking.
Maybe Yuki and Kagura start a club together? I assume Kyo wouldn't bother with more school and maybe he dropped out, much to Kagura's disappointment? She could turn to Yuki who has always been a good confidant? Maybe Tohru is able to show Momiji around, I see her being one of the folks who gives tours and helps out incoming students. Of course any romance will be gradual but it'll be interesting to see how dynamics play together.