​Nasa wants to move into a bigger apartment so that he and Tsukasa can sleep in one large bed instead of their current arrangement - him in the bed and she on the floor next to him.  In order to get a bigger apartment, they'll need a guarantor - which means Nasa is going to have to tell his parents he got married, something he's neglected to do yet.  Nasa's parents insist on meeting his wife before they do anything, so the couple must travel from Tokyo to Nara.  They stop over in Kyoto to do some sightseeing.  Along the way, the couple realizes that Chitose, Tsukasa's "sister" is following them and trying to sabotage and/or understand why they got married in the first place.  Chitose steals Nasa and demands he take her around Kyoto as if they were dating in order for her to see why Tsukasa fell in love with him.

Akira and Amelia decide to adopt the not-so-0fierce demon kitty. Amelia heals him, and Akira names him Night. Akira and Night form a new pact as master and servant, which will allow the demon king to still be able to see everything with the link inherent between demon king and all demons, but will give Akira and Night special abilities. Night reveals that there are three other dungeons in the world, and each dungeon challenges a different aspect of the character's skills. A portal opens at the end of the labyrinth, and Akira decides to travel to the next labyrinth in the forest of the Elven people, where Amelia is being hunted by her twin sister.  With Akira caught right in the middle of the power struggle in the Elven kingdom, will he ever make it to the labyrinth to continue his development?

Rayearth is one of those interesting series broken up into parts. While this is volume four if this series, it's labeled as "Part Two: Book One." In the 25th Anniversary Edition, Part Two is in a different boxed set than Part One.

Hikaru, Umi, and Fuu are still reeling from their major battle that closed out Part One. The three try to adjust back to normal life, but the weight of what happened in Cefiro weighs heavy on them. The three meet up in Tokyo Tower again to try to come to terms with what has happened when suddenly, they are transported again! This time, the world they enter is in shambles. The ocean is gone, the sky is black, and the only thing they can see is a castle standing tall above a jagged, rocky island. The three are taken to the castle, where they reunite with what’s left of the old cast, and they are told what grim fate has befallen Cefiro. They also discover that there are several invading forces from other worlds desperately clawing at Cefiro’s borders, all vying for the chance to install themselves as a new ruler. Our Magic Knights pick up the mantle once again in defense of this once-beautiful world.

Hot off of her successful acquisition of her first Stella, the Folger family is on the way to get a dog for Anya. They have no success at a pet store (completely stocked with agency dogs and run by the agency), so Yor and Anya try a pet expo while Loid gets feigns a bathroom emergency in order to slip away to his handler. Loid finds out that a foreign minister is in the country for peace talks, and there is a terrorist plot to blow up the meeting using highly trained — what else? — dogs! Anya, with her telepathic ability, accidentally discovers one of the terrorists’ lairs, but one of the highly trained dogs comes to her rescue. Anya sees brief glimpses inside the dog’s mind, and she realizes that this dog has a special ability! In their own separate ways, Yor, Loid with the agency, and Anya with the dog work against them terrorists in the name of World Peace.

Illustrated by Posuka Demizu
​
Emma, Ray, Don, Gilda, and two kids from Goldy Pond begin a search for the Seven Walls, something that Mr. Minerva told them to find in order to rework The Promise and potentially close down all of the factories. There are some significant time jumps as the group has to travel around the demon territory chasing down leads, but just shy of two years after the escape, the group finally cracks the code and discovers the entrance they were searching for. This has given plenty of time for the enemy to find them as well, as the Ratri clan has sought out every shelter and supporter to track down the wayward “food”.

Illustrated by Hiroyuki Aigamo

Akira has retreated back to the labyrinth his class went to in volume one, determined to gain maximum levels in as much as he can. He’s been in the labyrinth a month before he finds Amelia trapped inside a slime monster. She’s an elven warrior who has come to the labyrinth for the same reason, and the two decide to team up to defeat the most challenging monsters at the end of the labyrinth. Back in the castle, Kyosuke, another classmate whose class is samurai, wakes to find himself in the princess’s chamber, having just cut through six black crystals. He has no idea what he’s doing or what the crystals are until the next day when hero Tsukasa announces he’s going off to fight the demon king. The rest of the class ridicules him, all except six classmates, Kyosuke among them.

The beginning of this wraps up the storylines that happen around Christmas time, then launches into a new story arc - Takane’s grandfather is frustrated that Takane won’t give him details about how his relationship is going with Hana. He decides he’s spoiled the kid too much, so he takes away all his stuff: freezes his accounts, sets him up in a shoebox of an apartment, gives him two cheap suits, and around $91 to live on for the month. He says Takane must climb back up to the top from the bottom to prove himself. Takane is so embarrassed by his new situation that he refuses to see Hana. But, based on the advice of her friend Okamon, Hana takes a page from Takane’s book and decides to pester him for a change.

France continues to decay as the royal family amasses an amazing amount of debt, and the citizenry refuses to acquiesce to more taxes until an Estates General is called. Oscar’s father decides he will marry Oscar off to a wealthy noble, and claim a male child of Oscar's as his heir, but Oscar will have none of it, and sabotages the arrangements. The people of France demand the king reinstate a minister of finance who was sympathetic to the plight of the commoners. As the Estates General Meet and try to erode the power of the king even more, Louis I’d advised to bring in the military to squash the rumblings of the Representatives from the Third Estate (commoners). Oscar is torn apart by her sense of duty to follow the orders of the king and the military’s goal of protect her countrymen.

Tatsu, The Immortal Dragon is back at his antics.  He's brandishing a bottle of bug spray against The Black Bullet - a cockroach - who has been sent by an unknown enemy group.  Later, he takes a gig serving food in a restaurant to some really jumpy gentlemen who are probably still in the business.  Bargain hunting at the supermarket is made even more entertaining when a down-and-out mob boss' wife takes a job as a checker and double charges Tatsu for an item.  Tatsu tries to help his wife Miku relax after several long days at work, and he of course takes it to the Nth degree.  A touching reunion with his former boss allows The Immortal Dragon to show his domestic side to the fearsome former head of the Yakuza Crime family.

Tsugu moved away from her small town when she was in elementary school, but now, as a high school student, her family moves back.  After many years in the Osaka region (and Tsugu picking up the Osakan accent), Tsugu tries to reconnect with her group of friends from elementary school.  She finds that they none of them are in the same place they were when she moved away.  Tsugu has sprouted into a confident, gregarious, guitar player who tries not to let her misfortunes get her down.  Yuushin, the little boy who dreamed of being a hero, has resorted to bullying others, including his former friend Sora.   Sora has become ostracized and seriously thinks of ending his life because of the bullying.  Tsugu feels like she is still close to Asari, but several misunderstandings and rumors spread by Asari's other friends leave Tsugu unwelcome in Asari's social circle.  Tsugu tries not to let these tattered relationships get her down, and she works towards helping her friends remember their ideals they once had.