Uda is a treasure, favorite side character in a long time. UdaxRiri is wonderful, I think they're great for each other. I think it'll be interesting when Riri has the situation flipped back on her: now she's the one choosing an impossible one-sided love over someone close that cares about her. A fun story to read :)
I'm always glad when stories progress past the characters figuring out what love is, and that they share it. I think this'll be end up a longtime favorite.