What a beautiful, and well put together story this one was. Taking a break from the slapstick to focus more on the dynamic of the two sisters is a refreshing take. The animation of the water, and the flow of the race were nicely done. The lucid moments of Yuuji bringing Kazuki to her senses were a nice touch as well, showing us Yuuji is always in her corner cheering her on. Even Yuuji can have moments where he can say the most uplifting things sometimes. Love the way Hatsune was taking things all in stride, I guess the swimsuit she had prior was used as a prop and not for actually use in the water.