Four friends find a rock that actually works. They have one summer before everything changes. That's the entire premise, and it's enough because the show understands that the magic isn't in what you wish for, it's in standing there together while it happens. Every episode is just them being loud and stupid and present with each other, knowing the clock is running. By the end you won't remember half the wishes they made. You'll remember them laughing in a circle, pretending they have forever.
Natsumi, Saki, Yuka and Rinko have been friends since childhood, but their group is shaken when they learn Saki will move away and change schools at the end of summer. Local folklore says that if four close friends gather around a large rock behind a Shinto shrine in Shimoda and wish for the same thing, the wish will come true. When the girls try the legend, they find the magic is real. With Saki's departure approaching, they use the stone's power to fill what may be their last summer together with small miracles and leave no regrets behind. The result is a lighthearted supernatural slice-of-life comedy about friendship and a summer that cannot last.