While in search of his precious friend, a young boy named Nai falls captive to a beautiful woman, whose looks are matched only by her taste for human flesh. Meanwhile Gareki, a clever thief, is in the midst of robbing her luxurious home. After causing a distraction, Gareki agrees to help Nai escape, but they are discovered upon the woman's return. As she transforms into a ghoulish monster, the boys flee. On the run, Nai and Gareki are found by "Circus," a government defense agency that deals with criminal activity too difficult for the police to handle and protects civilians from "varuga"—terrible monsters that devour humans for sustenance. In the hope that it will lead Nai to his missing friend, he and Gareki decide to join Circus. On their perilous journey, they face dangerous varuga and begin to uncover the secrets behind a shadowy organization known as Kafka. [Written by MAL Rewrite]

Eight words describe the feelings of Youtarou Hanabusa: "I just want to live a normal life." Unfortunately for him, as a member of the Knights of the World, his training in this ancient and international order has left him with a condition he calls "White Knight Syndrome." This condition causes Youtarou to instinctively act heroically and chivalrously whenever he encounters someone in danger.

To protect his identity in such embarrassing moments, he carries a mask with him at all times. Then one day, he saves the life of Makio Kidouin, the young daughter of an elite and affluent family. Little does he know that this singular act of heroism will change his life forever. Soon, he is simultaneously blessed with a life in the lap of luxury and cursed with one of abnormality, for his new friend Makio lives a life far removed from the everyday.

Between coping with the hijinks of six-year-old Makio, and dealing with a cast of odd friends and scheming enemies, Youtarou must protect his new friend while keeping his identity hidden as the masked hero Knight Lancer.

[Written by MAL Rewrite]

In the mysterious future, crystalline organisms called Gems inhabit a world that has been destroyed by six meteors. Each Gem is assigned a role in order to fight against the Lunarians, a species who attacks them in order to shatter their bodies and use them as decorations. Phosphophyllite, also known as Phos, is a young and fragile Gem who dreams of helping their friends in the war effort. Instead, they are told to compile an encyclopedia because of their delicate condition. After begrudgingly embarking on this task, Phos meets Cinnabar, an intelligent gem who has been relegated to patrolling the isolated island at night because of the corrosive poison their body creates. After seeing how unhappy Cinnabar is, Phos decides to find a role that both of the rejected Gems can enjoy. Houseki no Kuni follows Phos' efforts to be useful and protect their fellow Gems. [Written by MAL Rewrite]

"Period" is how magic users called who beat "Spiral"—monsters that were summoned from isolation. Due to the rise of these beings, 14-year-old apprentice Period Haru, who is a part of the Eighth Arc-end Division, is called to break the cycle and cast himself into the endless battle. However, a mysterious thievery occurred and sank the division into bankruptcy, forcing Haru and his other comrades have to leave their headquarters. To rebuild a branch, they have to overcome quest after quest. (Source: MAL News)