While sheltering from the rain in a convenience store, high school sophomore Lin Yinxuan finds a blue rose brooch and unexpectedly meets Lin Yaru, an upperclasswoman from the international department. From the sugar glaze on taiyaki to clothesline signals on a stormy night, from piano variations to a lie about a meteor shower at the planetarium, the two weave a secret concerto through the rainy season, steeped in the scent of bergamot.
When Lin Yinxuan discovers that Yaru is the heir to the old inn where she stayed as a child, and a century-old love song between women surfaces from Yaru's ancestral jade, their hearts finally understand the chords of fate beneath Kyoto's century-old cherry tree. It turns out every "coincidence" was a promise their grandmothers buried in time, and every secret crush a polyphonic poem surging through their bloodlines.
