"D.C. Da Capo" is a manga series set on Hatsunejima, a fictional island where cherry blossoms bloom year-round due to a mysterious tree. The story centers on Asakura Junichi, a high school student living with his step-sister, Asakura Nemu, and their grandmother. Junichi’s life takes a turn when Sakura Yoshino, a childhood friend presumed to have moved away, returns to the island. Sakura’s reappearance stirs emotions and memories, as she claims to have never left and harbors feelings for Junichi. This creates a complex dynamic, as Nemu also has romantic feelings for him, leading to a love triangle.

The narrative explores themes of love, memory, and the passage of time, intertwined with supernatural elements tied to the island’s magical cherry tree. The tree is said to grant wishes, but at a cost, and its influence subtly shapes the lives of the characters. Junichi navigates his relationships with Nemu, Sakura, and other classmates, including the cheerful Moe Mishou, the reserved Kotori Shirakawa, and the enigmatic Miharu Amakase, who has a mysterious connection to the tree.

As the story progresses, secrets about the island, the tree, and the characters’ pasts are revealed. Sakura’s true nature and her connection to the tree become pivotal, as her presence is tied to the island’s magic. The series balances slice-of-life moments with dramatic developments, as Junichi grapples with his feelings and the consequences of the wishes made on the island. The interplay between the characters’ emotions and the supernatural forces at work drives the narrative forward, culminating in a resolution that addresses the central conflicts and the fate of the cherry tree.