For centuries, the Poison Masters have perfected the art of assassination. Among them, the Gero family stands as one of the five most powerful families of Masters, wielding unmatched skill and influence. Hikaru Gero, heir to this infamous bloodline, has lived his life deep in the shadows of the underworld, far removed from love or marriage. However, to ensure the Poison Master bloodline does not die out, the head of the Gero family declares that Hikaru's sister will be forced to bear an heir. Soon after, Hikaru crosses paths with Mei Kinosaki, a brilliant marriage swindler who also happens to be his current assassination target. Determined to protect his sister and solve the succession problem himself, Hikaru makes an unexpected request on the spot—asking Mei to help him get married. ...That's the first time anyone's ever proposed like that. And so, with the cunning marriage swindler Mei as his advisor, the elite assassin Hikaru sets out on the toughest mission for love. His goal? The ultimate marriage. The most unlikely duo—an assassin and a marriage swindler—take on the world's toughest mission for love! (Source: Official site)

When a young boy named Tooichi stumbles upon an old lamp in his grandfather's shed, he mistakes it for a toy and takes it outside to play. When his grandfather discovers this, he reprimands the boy and begins recounting the story behind the artifact—of how a small, traditional Japanese town became Westernized. In his youth, Tooichi's grandfather, Minosuke, made a living by doing errands and chores for the townspeople. After one errand takes him to a nearby town, he witnesses Western lamps—a technology unfamiliar to him—light up the streets, igniting a spark in the young boy. From that moment on, lamps became Minosuke's passion and profession, changing his and the townspeople's lives forever.

In 19th century France, a struggling single mother, Fantine, leaves her three-year-old daughter Cosette in the care of her new acquaintances, the Thernadiers. Unfortunately, Cosette's caretakers prove to be anything but loving, and the poor girl is subjected to repeated abuse and forced servitude. Still, she endures the torment in the hopes of seeing her mother once again. One night, while doing errands for her host family, Cosette is assisted by an honorable stranger named Jean Valjean. After a brief conversation with the young girl, Jean acknowledges her as the type of person he has been seeking and rescues her from the clutches of the Thernadiers. They make their way to a nearby town where Cosette enjoys a new life thanks to her savior. Under Jean's guidance, Cosette promises to help others with her newfound freedom. She pledges to heal the nation, ensuring that no one else suffers her fate. Though the road ahead is paved with tragedies left by the French Revolution, this idealistic girl will not rest until France is freed from poverty and suffering.