Before she became a memory,Mirai Saitowas a hurricane of strawberry lip balm, wild laughter, and impossible tennis dreams. This is the story of the girl who lit the match—and the fire she left behind.

At twelve, Mirai is already a legend in the making, her blistering serves and unshakable grin making her the star of Kaimei Junior High’s tennis team. But her true masterpiece isn’t her game—it’sAoi Minami, her shy, fiercely talented doubles partner. Together, they’re unstoppable, their bond forged in strawberry melon bread breaks and whispered promises of going pro. But when Mirai collapses mid-match and learns of a fatal heart condition, she makes a choice:protect Aoi’s future at all costs.

In her final year, Mirai becomes a architect of secrets:

To Aoi, she’s the same reckless partner, hiding dizzy spells behind extra practices.

To Haru Tachibana, a scrappy Osaka prodigy, she’s a demanding mentor, molding him to replicate her style.“You’ll be her anchor when I’m gone,”she orders.

To Shun Kurosawa, her fiercest rival, she’s a phantom, pushing him to greatness even as her body fails.

But Mirai’s greatest legacy isn’t her killer twist serve or the journals crammed with strategies. It’s the invisible net she weaves between those she loves—Aoi’s grief, Haru’s guilt, Shun’s rage—and the videos she records in stolen moments, each ending with her trademark wink:“Don’t let the rally die!”

As her heart weakens, Mirai races to tie loose ends: bribing coaches, forging transfer papers, and scribbling a final plea in her journal:“Tell Aoi I’m sorry. Tell her to keep playing.”On the day of her collapse, her last act isn’t a goodbye—it’s a desperate lob into the future, trusting her friends to return the shot.