Kitarou is a youkai boy born in a cemetery, and aside from his mostly-decayed father, the last living member of the Ghost tribe. He is missing his left eye, but his hair usually covers the empty socket. He fights for peace between humans and youkai, which generally involves protecting the former from the wiles of the latter. This version of the Kitarou story is based on the original Hakaba Kitarou manga, the manga which inspired the popular Gegege no Kitarou series in the late 60's.

There is a World Beautiful-Skin Competition (WBC) to which the 3 billion women of the world aspire. Carrying on the 300-year legacy of the competition are the twin Bihada sisters, Sara and Saki.

While most fifteen-year-old boys, in one way or another, harbor secrets that are related to girls, Takashi Natsume has a peculiar and terrifying secret involving youkai: for as long as he can remember, he has been constantly chased by these spirits. Natsume soon discovers that his deceased grandmother Reiko had passed on to him the Yuujinchou, or "Book of Friends," which contains the names of the spirits whom she brought under her control. Now in Natsume's possession, the book gives Reiko's grandson this power as well, which is why these enraged beings now haunt him in hopes of somehow attaining their freedom. Without parents and a loving home, and constantly being hunted by hostile, merciless youkai, Natsume is looking for solace—a place where he belongs. However, his only companion is a self-proclaimed bodyguard named Madara. Fondly referred to as Nyanko-sensei, Madara is a mysterious, pint-sized feline spirit who has his own reasons for sticking with the boy. Based on the critically acclaimed manga by Yuki Midorikawa, Natsume Yuujinchou is an unconventional and supernatural slice-of-life series that follows Natsume as he, with his infamous protector Madara, endeavors to free the spirits bound by his grandmother's contract.

In a dystopian future, detective Shinjuurou Yuuki—known by some as the "Defeated Detective"—solves mysteries throughout Tokyo. Aided by his odd associate Inga, Shinjuurou's insight and ingenuity in cracking cases, particularly homicides, lead to numerous mysteries solved and culprits caught. However, his partner seems to have some other, more sinister intentions for the people they catch, and the truth of the assistant's identity and motivation is shrouded in secrecy.