Years after retiring from their formidable ninja lives, a dysfunctional family must return to shadowy missions to counteract a string of looming threats.

Soft and bubbly office lady Ayaka is madly in love with her senior at work, Hiroko! Two lovestruck coworkers who both think the other is straight totally crush on each other...

The suspense story begins when Jin Saeki, a policeman in Yamanashi Prefecture, arrives at a prominent estate residence in response to a tip, and finds the skeletal remains of 13 children, as well as a mysterious marking. Jūzō Haikawa, the long-missing owner of the estate, immediately becomes the prime suspect. Saeki collaborates with a woman named Kanon Hasumi, who has a connection to Haikawa, and together they search for the truth behind the case. In a parallel story set in Tokyo seven years after the case, a girl with a connection to the mark left on the Haikawa estate runs away from home.

Eimi, who came to Tokyo after graduating from junior high school, invites her sister Yu, who lives in her hometown of Shiga, to move to Tokyo with her. She is reluctant at first, but suddenly accepts and soon after goes missing. One day Eimi meets Hiyori, whose sister is also missing. Everything changes when the police contact her to inform her that they have found the body of a young woman in Lake Biwa, but the body is that of Hiyori's sister, not Yu. Together Eimi and Hiyori search for the murderer, but things take an unexpected turn.

Chiwawa is a popular girl. One day, her dismembered body is found in Tokyo Bay. Chiwawa's friends gather to remember her, but they realize they do not know anything about her background or even her real name.

Fleeing to Tokyo with the hopes that she can fulfil her dream of becoming a dancer, Yume is met with the harsh reality that success isn’t something that comes quickly or easily. Whilst juggling her job as a hostess in Tokyo’s red-light district, Yume throws herself headfirst into studying the artform and integrating herself into the underground dance community.