When 19-year-old medical prodigy Ayano Hayakawa runs into Ryoga Echizen at an illegal tennis-betting game on a New York street, he is using a tennis ball to shatter a sniper rifle’s scope. Orange juice sprays across the bullet hole like blood-red fireworks. She is a secret informant carrying a scalpel; he is a cleaner for the “dark web,” moving between the worlds of light and darkness. Their first encounter, wrapped in the scent of citrus and gunpowder, etches coordinates spanning life and death onto the scoreboard.
On a stormy night in Tokyo, amid the flames of an exploding laboratory, his bloodied bandages wrap around her poisoned wound. A genetic test shows that their mitochondrial compatibility is 99.8 percent. The secret of an embryo frozen twenty years ago cuts through the lies like a blade: the medical accident that cost Ryoga his mother concealed the crimes erased from the Hayakawa family’s history.
From New York’s alleyways to Gunkanjima in Okinawa, coded messages in orange soda conceal the secrets of their pounding hearts. As he teaches her to cut open a frozen embryo with a scalpel, the blade reflects fragments of memories from their childhood together. On the court, she uses ball-speed equations to calculate the gaps in his heartbeat, only to discover that every value points to the same truth: their carefully orchestrated encounters and betrayals were nothing more than a desperate person’s confession, written in code with their life.
When a multinational conglomerate’s guns are aimed at the cherry-blossom birthmark on Ayano’s collarbone, Ryoga tears off his bandages to reveal a mechanical prosthetic arm, then sends her beyond the reach of death with one last outside-spin serve. Orange seeds scatter and sprout in the hail of bullets, growing into a vast web of lies and heartfelt truth. The most dangerous experiment of all, it turns out, is making the genes of sworn enemies resonate when they fall in love.
