A huge fan of the Hiroshima Carp baseball team, you the viewer become the story protagonist, Ryo Kirigamine, vice-president of the Young Detectives Club at Tokyo’s Koigakubo Academy. In the search for truth, each week the school club gets tangled in perplexing local crimes and mysteries, including murder!
Ryo is a self-avowed super detective, but tends to get lost in the maze of clues at critical junctures of a case. But never fear; there are plenty of people to come to get her back on track, including the biology teacher, Hiromi Ishizaki. Take part in an intricately-constructed, hardcore mystery every week.

2013. A brilliant physicist, Reizi Matsushima, has been murdered, but nobody knows why. His beloved fiancé, Mayo Ando, soon finds her life in danger as well as she is pursued by the unknown killer. Seemingly out of nowhere - from her desk drawer! - a mysterious "man" appears who calls himself Roid and is the spitting image of Reizi. Roid proceeds to make it his singular mission to protect Mayo from danger while espousing that "justice without power is meaningless." Yet to Roid, words like "love" are unfamiliar as are human anger or grief. Wary at first, Mayo gradually begins to harbor feelings for Roid due to an existential sadness she detects in him amid a world where motives intersect between the present and the future 100 years ahead. What does fate have in store for a woman who has lost love and a man who doesn't understand it?

Our story begins with travel agency headquarters' tour planner, Endo, being suddenly transferred to work at Narita International Airport in what he deems a depressing demotion. From his first day, the dorky Endo struggles to make the adjustment to his new, female-dominated environment. His subordinate, Morio, views him with utter contempt while his superior, Koizumi, is pathetically trivial and unreliable. Together with his quirky colleagues, Endo frantically tries to resolve a never-ending barrage of customer relations issues at the airport counter when all he seeks is a ticket back to company headquarters. As time passes, however, Endo begins to gradually share his colleagues' passion for the work, evolving from wanting to just "get people in the air" to "ensuring they depart with smiles on their faces." Endo's transformation to a hard-worker devoted to the customer even sparks new feelings toward him from his severest critic, Morio.

Yuko Hizaki is a child psychologist working for the city’s child counseling service. She’s saddled by a senile father and a mother grown weary of nursing.
Shunsuke Sudo is a high school teacher resistant to the idea of marrying and building a family with his girlfriend. Ai Yoshizawa, who is highly antisocial, is one of his students. Koki Mamihara is a cop who suspects foul play in a family suicide. The case begins to rouse each character to life amid a rush of events in this foray into the pettiness, pathos and nobility of human nature, based on a representative work by novelist Arata Tendo.

In the year 2060, a failed science experiment has brought about a barren, famine-plagued world where “flowers” no longer bloom. While recovery efforts show promise, District 7 - ground zero for the accident - has been left to its own devices, exempt from reconstruction as “an abandoned city.” One resident of District 7 is Ai, an angelic-looking young girl who hides a darker face. As member of a team of assassins called “Last Garden,” she is a coldhearted killer who carries out her assignments with faithful precision. Her life now roiled by a bizarre fate, this lone woman assassin must simply learn to survive.

For generations, the blue-blooded Homonji family has been devoted to a pure and rigorous pursuit of knowledge in all forms, regardless of the powers that be or the fortunes of the aristocracy with whom they sympathize. But now, inheriting the pedagogic mantel of the family as its 89th master is Sharaku Homonji, a super genius with an IQ of 246, and a man with time on his hands. “Ah, I’m so bored. Isn’t there a puzzle I can solve?” Sharaku goes in search of “worthwhile” mysteries to crack, putting his super genetic brain to the test.

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.