Yukiko, Seiko, Yoko and Takako are the most improbable group of friends given the fact that they work in very different industries and live in different worlds. Yukiko is a fashion maven devoted to expressing her individuality through clothes. But she’s pushing 30 now, and is beginning to acknowledge the pressure to dress appropriately for her age. Seiko has been promoted to a managerial position but finds herself having to constantly do battle with her elder male subordinates. Yoko fantasizes about marrying a gorgeously handsome company freshman 12 years her junior. Takako is a devoted single mother whose hard daily effort more than compensates for a father role.

Four grown sisters return to life under one roof in the Hanawa home, headed by their “hunk” of a father and perennially girlish mother (who adores her husband and never doubts for a moment that his feelings are mutual). Although raised under the example of a seemingly model marriage, the “four Hanawa sisters” themselves are either divorced, devoutly single, in the market for a husband or simply unlucky in love. The second eldest daughter, Takemi, is the “black sheep” of the family who returns home after multiple divorces and three kids in tow. Having lived her life as honest to her own feelings as possible, she can’t help but stir trouble - leading to some hilarious predicaments - and always commands the center of attention, earning her such nicknames as “problem child”, “love-starved man-killer” and “she-devil.” “Marriage”, however, is the constant operative word in this domestic drama of women in search of a formula to happiness.

Two years have passed since the world’s most heinous act of biological terror. Now once again, Japan is under attack by a new sinister plot to destroy Tokyo with a nuclear device. A plane is hijacked, and among the passengers is the same the ringleader of the viral terror two years ago. With the nuclear clock ticking down, it is once again up to Fujimaru, aka Falcon, to overcome betrayal and save Japan from a new and powerful enemy. The time has come to reveal the truth!

A high school student and genius hacker, Fujimaru a.k.a. “Falcon,” uses his sophisticated hacking techniques to indict the fraudulent acts of evil villains. In order to save his family, friends, and the entire world, he fights against “Bloody Monday”, the worst and most evil form of viral terrorism. As spies of the terrorist institution infiltrate into schools and police organizations, and the terrorist threat grows through a chain of treacherous acts, how will Falcon outsmart them in their intellectual battles?

Ryo Naruse, who is an able attorney that can turn any case in his clients’ favor, takes cases for the disadvantaged and defends them free of charge; therefore, he is called an “angel attorney.” However, it is only superficial. His true self is that of a man who has sacrificed all his life to track down the murderer that killed his dearest younger brother 11 years ago — that is, he is “a cold-blooded revenge seeker, or the Devil King.”

A sharpshooting rookie and a veteran with a brilliant track record are paired to solve a number of different cases. The two incompatible women clash about everything, and we see them developing a friendship, hating one another, working as team, laughing and crying as they follow the trail of clues set by a serial killer.