Something I never see in Keion future fanart or when people speculate about them in the future is Yui and her photography. We only see it in the very last chapter, but I feel Yui would probably take up photography as a hobby throughout College
Probably like Niikura from CITY, (also voiced by Aki Toyosaki) she'd enter photo contests and what not to try get a bit more money and to have fun with it