In the shadowy depths of the criminal underworld, the two most formidable Mafia families, the Yamada Ryo and the Ren Ito, are locked in a relentless, winner-takes-all war. Their ultimate prize: AJT 606—the legendary chip capable of transforming any human into the world's most powerful supercomputer. Whoever possesses it will become the Supreme Ruler. But the secret of AJT 606 is guarded by a mysterious, imprisoned couple, and only one person can track their ghost: their prodigious daughter. Eiji, the youngest son of the Yamada clan. Handsome, sharp, and notorious in the criminal world for his cold-blooded ruthlessness. He harbors the ambition of succeeding his father's dark legacy. To access classified information about AJT 606, Eiji adopts the guise of a university student, though he is, in reality, a notorious rogue genius within the Mafia ranks. His target: Akiko. Akiko, the elegant and youthful university lecturer. Seemingly frail, she is actually a supreme hacker, cut off from her parents for four long years. She is the solitary key. Their paths collide with the explosive force of an inevitable showdown. Amidst lecture halls and clandestine operations, misunderstandings and fierce arguments constantly ignite. Eiji maintains a façade of cold indifference, yet time and again, his instinct to protect the woman he loves surfaces. When his father commands him to "dispose of" Akiko, Eiji rebels against his entire family to shield her. As Eiji and Akiko slowly draw closer, navigating the crossfire between the two Mafia factions and the relentless cyborg assassin squads (under the maniacal manipulation of Ren Kazuki), they face more than just the deep-seated hatred of Eiji's older brother or the silent, profound love of Taichi—the dedicated police officer who serves as Akiko’s protector. When Eiji decides to sacrifice the throne and defy his family for love. When Akiko must place her trust in her sworn enemy... Join this exhilarating, high-stakes race: where a kiss can be a cipher, a heist is a declaration of love, and death inside a survival game can claim their lives in the real world! Who will emerge victorious in this ultimate game of power and passion? And can love survive when everything—even the most genuine sacrifice—is a lie?

Jenny is a student at the National University. Orphaned at a young age, she was raised by her loving older brother. Despite the hardships of life, Jenny was always optimistic, confident, and strong. Daniel, a wealthy young man with a weak heart, was saved by Jenny during one of her pizza delivery rounds. After this fateful encounter, they became friends. Daniel was studying film directing at the same school as Jenny. Since becoming friends with Jenny, Daniel has become more cheerful and optimistic. Jenny showed him the meaning of this beautiful life. Martha, their classmate, was always jealous of Jenny. She constantly looked for ways to mock, humiliate, and belittle Jenny because Jenny was more beautiful and successful than her. When she saw Jenny and Daniel becoming close, Martha became even more resentful and malicious, especially since she was Daniel's fiancée. Daniel didn't love Martha. Daniel loved Jenny with all his heart. Even when his father opposed their relationship, Daniel was willing to leave his family to be with the woman he loved. Daniel was constantly in danger, not only because of his heart condition but also because of a dangerous relative - his cousin Hubert. Hubert always pretended to be trustworthy and kind, but he had tried to harm Daniel many times. Hubert's motive was the immense family fortune. Without Daniel, he would inherit everything. Another reason Hubert didn't want Daniel to exist was because he loved Martha. Driven by blind love, Hubert repeatedly tried to harm Jenny at Martha's instigation. Jenny overcame many challenges with her intelligence and strength to protect her love. Unfortunately, Jenny's older brother died in an accident. Her brother had wished to donate his organs after his death, and the lucky recipient was Daniel. Thanks to that heart, Daniel gradually recovered. Jenny had no idea that her brother's heart was now beating in Daniel's chest. Martha revealed to Jenny that her brother's accident was not an accident. What was the truth behind it?