A hauntingly beautiful tale that weaves together the fleeting bloom of Kyoto's spring, a series of hand‑sent postcards, and a love that refuses to fade. When Hana receives a mysterious postcard decades after her first love vanished, memories surge like the river Katsura—pulling her into a maze of secrets, regret, and the lingering scent of sakura. This lyrical, unabridged novel explores how the past can both imprison and liberate, inviting readers to chase the ghosts of what might have been.