After her parents divorced, Shima Sumitomo lived with her mother. She felt uncomfortable living with her stepfather and she was unable to hang out with people at her high school. Shima Sumitomo decides to move to Hokkaido where her father lives. At her new high school in Hokkaido, she meets classmate Gen Tatebayashi and Wao Sakurai. They are the two most popular boys at her school. A principle of her school is that "Gen and Wao are for everyone." If anyone breaks the rule, that person will be ostracized. Even so, Shima Sumitomo gets closer to Gen and Wao.
Shinichiro Hanasaki, a former detective with the police department, is currently engaged in running a nursery called “Smiling Garden.” He wishes to help poorer families and single parents by offering very low fees for childcare, but this leaves the nursery struggling financially. To replenish the budget, Shinichiro decides to open a private detective agency at night.
A politician gives a speech in a shopping district full of shoppers. Suddenly, a man wielding a knife bursts out from among the shoppers and tries to kill those around him. To stop the man, Masako Murata (Pinko Izumi) tries to approach him, but her friends stop her. Meanwhile, a woman, who looks like a homeless person, appears in front of him and tells him "if you want to kill, then kill me." The man is about to stab her, but the woman opens her eyes. At the moment, blood bursts from the man's arm. The woman is about to kill him, but Masako Murata stops her and the woman leaves. Later, Masako Murata finds the woman collapsed on the street. Masako decides to take the woman to her house. There, Masako sees that the woman is injured in her back and also notices heavy despair in her eyes. The woman's name is Sana (Yuriko Ono). Sana is a ninja that has arrived in present day Japan. She now follows Masako Murata as her new boss and attempts to eradicate evil that is rampant in modern society.
A wedding is supposed to be the happiest moment in a couple's life. But what if someone among the attendants does not wish success for the newlywed couple? One morning, Takako, a wedding planner, finds a threatening letter sent to the wedding hall that says, "Cancel today's weddings. Otherwise, you will receive divine punishment." There are five weddings scheduled that day, but Takako ignores the letter and decides to duly host the weddings and find out who is behind the threat.
Nao Yoshino is a girl who fails the entrance exams of her target high school. She winds up enrolling in a technical high school called Kenritsu Asuka Kōgyō Kōkō, also known by the nickname "Asukō". Out of the 148 entering freshmen, only three are girls, and Nao is the only one in her class.
