Nube is a clumsy, easygoing, and very kind teacher, but he has a secret under his glove on the left hand. He has a monster hand, and he also has the ability to sense ghosts and evil spirits. So he protects his dear students from these evil spirits with his monster hand, proving to be very powerful.

Somewhere in the vast sea of the Internet, there's a website that can only be accessed at the stroke of midnight. Known as the Jigoku Tsushin, rumor has it that if you post a grudge there, the Jigoku Shoujo will appear and drag whoever torments you into the inferno. Very little is known about the girl - all we know for sure is that she lives with her equally enigmatic grandmother, that three magical straw dolls accompany and serve her, and that whenever a posting on the Jigoku Tsushin moves her, she becomes the Jigoku Shoujo.

Ai Enma once again returns as the Jigoku Shoujo, who uses Jigoku Tsuushin (Hell Hotline) to allow people to post their grudges on their tormentors, sending them straight to Hell. In exchange, the users of the website will end up in Hell after they die. Meanwhile, a mysterious girl with purple eyes called Kikuri appears and seems to have strange intentions towards Ai and Jigoku Tsuushin's operation.

After Ai Enma's supposed death after the events of the 2nd season, her three helpers, Ichimoku Ren, Wanyuudou and Hone-Onna live out their lives in relative peace. This is suddenly shattered when Kikuri returns to recruit them. Meanwhile, Ai mysteriously reappears from the dead and uses the body of a young schoolgirl, Yuzuki Mikage, to continue the Jigoku Tsūshin operation. Yuzuki is aware of Ai's presence however, when she can see what Ai sees.

Jing may appear to be a young boy, but his remarkable skills make him one of the most feared thieves on the planet. Along with his feathered partner Kir, Jing travels from town to town, stealing anything of value regardless of the amount of security. But when he's in a pinch, he has one more trick up his sleeve: Kir bonds with Jing's right arm to perform the effectively deadly "Kir Royale" attack. And because of all this, Jing is infamously known by many as the "King of Bandits."

Set in a time of chaos, seven heroes of the Stars, the Hokushintenkun, rise up to lead the people. Two of the seven, the Nitenshinson, the Hagun and the Tanrou, are never supposed to exist at the same time, but fate has decided otherwise. Taito, chosen as the Hagun, now must rise up to defeat the Tanrou, as the fate of the Stars destined it to be.

In the world of Mugen, monsters called Jyarei Monsters fly up out of the ocean and attack the Novel Pole, the giant pillar that connects Mugen to Heaven, So 12 warriors, each an animal on the zodiac, are chosen to go from Novel-realm to Novel-realm and defeat the Jyarei.

Thor and his twin brother, Rai, are cast off to a forsaken planet by unknown masked men after witnessing the suspicious death of their parents. Given only a beam knife and a smelly satchel, they wander together in search of civilization on the primarily plant based world. They soon discover the plants have the advantage. Only the strong survive; the ones who throw away their humanity and become the beasts humans once were.