The world is divided into two kingdoms: the Kingdom of White, which floats in the heavens and is ruled by their queen Iris, and the Kingdom of Black, which stands upon desolate land below and houses the King of Darkness as its ruler. As of late, forces of evil have amassed great power, posing a threat to the entire world. Being the main representative of the Light, it is Iris' duty to maintain the balance of the world and fight off the darkness in her kingdom. Meanwhile in the Kingdom of Black, rampaging monsters annihilate a certain boy's village, leaving him the sole survivor. As he grieves in hopelessness, an armored man named Skeer notices the child and comforts him. Soon after, Skeer recognizes the boy's potential to change the kingdom's status quo and makes him his heir before passing away. The boy then vows to become the Prince of Darkness—the one who will replace the King—to bring the world back to its rightful path. As Iris and Prince of Darkness each challenge the impending doom the world faces in their own respective ways, their destinies will converge with each other, and perhaps, their bond will decide the fate of the world. [Written by MAL Rewrite]

Following the events of Jigoku Shoujo Futakomori, Ai Enma, the Hell Girl, has disappeared. Her former companions decide to lead normal lives, until their absent mistress returns to them with a new companion, and in a way that none of them anticipated. Yuzuki Mikage is a normal schoolgirl who soon comes to understand the Hell Girl on an intimate level. During a dream-like trance in the bathtub, Ai kisses Yuzuki and possesses her. So when Yuzuki's friend decides to type in the name of their teacher in the Hell Correspondence website, Ai makes use of Yuzuki's body to accomplish her own task of ferrying the teacher's soul to hell. Yuzuki is disturbed by her new circumstances and wonders why she was chosen to continue Ai's work. Unfortunately for her, the Hell Girl and her assistants resume operation of Hell Correspondence, and she is dragged along for the ride towards hell itself. [Written by MAL Rewrite]

Specials included with the BD/DVD release of Kobayashi-san Chi no Maid Dragon.

Katakura Kippei is in every way a high school playboy. Spending his days flirting with any female he can see, responsibility is the last thing on his mind. Life takes an unexpected turn for him as one day he returns home to find himself with the fulltime task of caring for his 5-year-old cousin. Kippei's aunt Miyako had disappeared, appearing to have abandoned his cousin, Yuzuyu. With Kippei's lack of responsibility and knowledge of childcare and Yuzuyu's injured heart with the disappearance of her mother, their time together is in for a bumpy ride.