Non-blooming Sakura Blossoms

S1 E5: "Nanaka begins to spend increasing amounts of time practicing for the upcoming festival at the temple, where she will perform a traditional dance so the sakura will bloom that year. Unexpectedly, she ditches practice to go with Sana, Syuri, and Asami to help at a retirement home. And a the day of the festival, everyone watches Nanaka perform her dance, including Sana..."