After receiving the archangel Metron's blessing, Haruyuki sets off with Takumu, Chiyuri, and Blood Leopard still determined to fulfill his vow to save Nico from imprisonment. When they charge into the Acceleration Research Society's main base, they overcome several obstacles and eventually face off against Black Vise and Argon Array! But the moment they think the true fight is beginning, a mysterious red light descends, heralding the birth of Disaster Armor Mk. 2!!

After receiving the archangel Metron's blessing, Haruyuki sets off with Takumu, Chiyuri, and Blood Leopard still determined to fulfill his vow to save Nico from imprisonment. When they charge into the Acceleration Research Society's main base, they overcome several obstacles and eventually face off against Black Vise and Argon Array! But the moment they think the true fight is beginning, a mysterious red light descends, heralding the birth of Disaster Armor Mk. 2!!

Prepare for a full dive! Despite their grueling battle and narrow victory over Oscillatory Universe, Nega Nebulus was unable to get any hard evidence of the connection between the White Legion and the Acceleration Research Society...or so they thought. Thanks to a key exchange captured by Chocolat Puppeter's replay card, they've got all the proof they need! It's time to expose the White Legion's crimes before the entire Accelerated World! Let the fourth meeting of the Seven Kings begin!

A CITY OF HIDDEN DEPTHS! ​In the year since the Battle of the Sanctuary, Subaru Natsuki has been busy honing his skills alongside Emilia and the other members of their merry band. Still, these peaceful days cannot carry on forever—and it is none other than Anastasia, Emilia’s rival in the royal selection, who brings their respite to an end with an unexpected hand-delivered letter bearing an invitation to the famous Water Gate City of Pristella. Despite their suspicions about the sudden request, they accept and set off for the trade hub that lies at the kingdom’s border. There, among the inviting canals and dazzling streets, await old friends, new faces, and a hidden menace lurking in the shadows!

Prepare for a full dive!After their battle with the Acceleration Research Society, Kuroyukihime and the other members of Nega Nebulus have finally resolved to face the White Legion, Oscillatory Universe! To have a fighting chance against White Cosmos, Nega Nebulus knows that forming an alliance with the Green Legion is paramount. So after scheduling peace talks with the Green Legion's Master, Green Grandé, Haruyuki travels to their home base, located in the Shibuya Ward. But when he arrives, he discovers that the one awaiting him is none other than...Kuroyukihime in a swimsuit?!

PREPARE FOR A FULL DIVE! ​Following a narrow triumph against the Sun God Inti, Haruyuki and company are immediately faced with a new adversary: The Deity of Demise, Tezcatlipoca, whose appearance heralds the ends of the Accelerated World as they know it. To stand a chance, Haruyuki will once again have to dig deep and discover new reserves of untapped power. At the same time, the battle against White Cosmos and her Legion enters the endgame. As the Burst Linkers fall one by one to these mighty foes, Haruyuki makes his most difficult decision yet...

In the wake of the culture festival, a new challenge awaits Haruyuki in the fifteenth volume of the light novel series from acclaimed author Reki Kawahara!