Yume no Kawa is certainly a fitting leaving song for Aachan, and I liked the simplicity of the PV. And I was happy for Jurina to have the chance to be part of that farewell.
Here is an old reminder of how adorable Atsuko Maeda was in the earlier days, as were all of the girls in this performance of
投げキッスで撃ち落とせ! / Naggekissu de Uchiotose (Shoot me Down with a Blown Kiss)