Chapter Summaries

William discussed what the Vessels wanted to do, then traveled with them and Nangong Natsuki to the Ice Coffin. There, Dimitrie Vatler recognized the ice as the work of the Snake Old Man, while Iblisber Yagiz asked him to explain.

• William told Nangong Natsuki that the Vessels could choose whether to stay outside or return to the Star Source.
• Nangong Natsuki led William, Aurora, and the four other Vessel girls away using her magic circle.
• Iblisber Yagiz examined the Ice Coffin and challenged Dimitrie Vatler to make their meeting a battle.
• Vatler resisted Iblisber's magical power and recognized the Ice Coffin as the same kind of ice that had once frozen him.
• Vatler apologized to Iblisber and prepared to explain his guess that the Snake Old Man had made the Ice Coffin.

Gada arrived at the banquet and learned that a spirit had defeated Vatra in Aldikia, making her eager to face the newcomer. William appeared by shattering the Ice Coffin and destroying the Arms Dealer’s corpse, while Vatra recovered and confronted him.

• Gada appeared atop the Ice Coffin, recognized its immense ice power, and heard Vatra describe his defeat in Aldikia.
• Iblisber recalled reports of Vatra being defeated by a spirit, and Gada eagerly anticipated the spirit’s arrival.
• Gada asked Kanon Kanze when William would arrive, and Kanon said he was punctual.
• An invisible force knocked Vatra’s golden mist backward as William appeared atop the shattered Ice Coffin, destroying the Arms Dealer’s corpse.
• Vatra healed, returned in bloodstained clothes, and warned William not to look at him that way again.

At the start of the Feast of Blazing Light, William summoned the Vessels and Nangong Natsuki to face Iblisber and Vatra while he and Gada unleashed their full power. Vatra and Nangong Natsuki agreed to watch the clash and let its victor claim Vatra’s Vessel, as Enatos prepared to fight.

• Kanon Kanze declared that the Lion King Agency would arbitrate the Feast of Blazing Light and then withdrew to watch.
• William demanded that the others hand over their Vessels after he dealt with them, then summoned five blonde girls to confront Iblisber and Nangong Natsuki to face Vatra.
• William and Gada unleashed their full power, tearing through the clouds and damaging the artificial island.
• Nangong Natsuki and Vatra agreed to watch the battle, with Vatra offering his Vessel to the victor.
• Enatos, marked with Ⅸ, announced that their fight would begin.

William and Gada unleashed their powers against their opponents, turning Azure Paradise and the surrounding islands into a natural disaster zone. As the battle raged, Nangong Natsuki considered La Folia’s suggestion, while Lucas watched from Aldikia and reflected on why no one dared offend a True Ancestor.

• Iblisber faced the five Beast Vassals summoned by Enatos’s identical girls and charged to fight them.
• Gada summoned her Beast Vassal Xiuhtevtli, opening a fissure that erupted with lava.
• William unleashed a blue lightning beam against Gada’s volcanic torrent, and their clash shook Azure Paradise and Island of Gen'ei.
• Nangong Natsuki watched the destruction and began seriously considering La Folia’s suggestion.
• Lucas watched the battle on a screen in Aldikia’s royal palace and affirmed that his earlier decision had been clear.

La Folia reassured Polifonia that Aldikia would not be abandoned and called for preparations to take over Gen'ei Island and secure the Spirit King's standing. Meanwhile, William and Gada escalated their battle until William unleashed Snow-Cold Long River, freezing the surrounding sea and leaving Gada encased in frost.

• Polifonia worried that William would settle on Gen'ei Island and abandon Aldikia, but La Folia reassured her.
• La Folia said they needed to prepare to take over Gen'ei Island and secure a status equal to the True Ancestors for the Spirit King in the Whispering Courtyard.
• Gada enjoyed fighting William and offered him the Vessel if he gave her a satisfying battle.
• Gada summoned Camaxtli to expand the storm clouds, and William poured spirit energy into them, intensifying the lightning and tumultuous sea.
• Gada brought out Xolotl, whose black threads warped space, and William answered with a surge of cold that swallowed the battlefield.
• William used Snow-Cold Long River to freeze the waves into glaciers and leave Gada covered in crystalline frost.

William fought Gada, the Third Progenitor, while directing his freezing attack away from Gen'ei Island to prevent the battle from causing a tsunami. Gada broke free and continued attacking, but William struck her hard enough to send her crashing into the beach, where she rose in a horrifying condition.

• William froze Gada and directed the frigid air away from Gen'ei Island, protecting its residents from the spreading shock waves and rising seas.
• Gada broke out of the ice with the heat of her crimson flames and wielded her Beast Vassal as a spear.
• Gada attacked with shadows and a spatial strike, but William summoned an ancient sword and blocked her.
• Gada clawed William's skin while reaching for his heart, and William punched her, driving her through the ice and into the beach.
• Gada climbed out of the crater with her clothes bloodied and torn, and the damage to her head and eyes made her appearance horrifying.

William and Gada stopped fighting after neither could kill the other, and Gada sought to trade for his blood. Vatra hoped to obtain William’s blood through a similar deal, while Kanon kept reading and Nangong Natsuki returned to the Island of Gen'ei.

• Gada regenerated after William blew apart her head, while her attack left him with only shallow scratches.
• William explained that Gada’s 27 beast vassals made her effectively impossible to kill, and Gada conceded that she had lost the exchange.
• Gada cleaned herself with Tlaloc, changed into a white gown, and asked William what he would accept in exchange for his blood.
• Vatra overheard Gada’s request and hoped to secure William’s blood through a deal of his own.
• Kanon continued reading, while Nangong Natsuki returned to the Island of Gen'ei to handle the situation.

William considered Gada's proposal to become partners in exchange for his blood and her treasures, and found himself tempted by her claim that she was untouched. He left the decision open by saying the arrangement sounded interesting.

• William asked Gada to find Magecraft books and said they could decide on a blood deal later.
• Vatra turned into a thin, pale-golden mist and scattered on the wind.
• Gada offered to make a deal immediately, then suggested that she and William become partners in exchange for his blood and her treasures.
• Gada claimed she was still untouched and said William could do whatever he wanted with her.
• Kanon Kanze listened anxiously as William admitted that Gada's proposal sounded interesting.

After the Feast of Blazing Light, William met Nangong Natsuki at Akagami Academy and offered to compensate her for handling the Management Corporation’s concerns. He revealed he had no plans to leave Island of Gen'ei, then made her an offer to join him.

• Hina surveyed the calm sea after the Feast of Blazing Light and was relieved that Master Ento had been assigned to watch the powerful visitors.
• William sat in Nangong Natsuki’s luxurious office while she warned him not to prey on her students.
• Nangong Natsuki explained that she had been fending off the Management Corporation’s officials because William had not reported his departure from Island of Gen'ei.
• William teased Nangong Natsuki by saying he would not leave the island, then told her he had come to compensate her and offer her a place with him.
• Nangong Natsuki asked William what he meant by an offer and compensation.

William offered to free Nangong Natsuki from her demon contract in exchange for becoming his, and she focused on what would happen to the Prison Barrier. After learning why she had been made its warden, William declared that he would take control of Island of Gen'ei once he dealt with the Vessels.

• William explained that witches paid a terrible price for their power and offered Nangong Natsuki long life, spiritual power, and freedom if she became his.
• William gave Nangong Natsuki a parchment contract and said he could tear up her demon contract because he was the Spirit King.
• Nangong Natsuki asked what would happen to the Prison Barrier if she lost her contract, showing her concern for Island of Gen'ei's residents.
• William explained that the Artificial Island Management Corporation had made Nangong Natsuki the Prison Barrier's warden to contain powerful criminals and protect the island.
• William snapped his fingers and declared that he would take control of Island of Gen'ei after dealing with the Vessels.

William entered Nangong Natsuki’s Prison Barrier and found her real body sleeping in a desolate hall. As he leaned toward her, Nangong Natsuki woke and stopped him, accusing him of seeking a reward before he had fulfilled his promise.

• William and Nangong Natsuki entered the Prison Barrier through her dream.
• William found the real Nangong Natsuki asleep in a velvet-upholstered chair in the dark hall.
• William approached the sleeping Nangong Natsuki and lifted a lock of hair from her forehead.
• Nangong Natsuki woke, pushed a hand against William’s chest, and challenged him for trying to collect interest before keeping his promise.

William visited the Prison Barrier with Nangong Natsuki, who decided there were no prisoners worth sparing and revealed a painful story about her friend. He left to handle what had happened to her friend, while Natsuki remained alone in the dream prison.

• William teased Nangong Natsuki, and she restrained him with the Chain of Commandments.
• Natsuki decided none of the Prison Barrier's criminals deserved to be spared.
• William lifted Natsuki onto his lap and encouraged her to make her request.
• Natsuki recounted what had happened to her friend, and William promised to handle the matter for her.
• William vanished, leaving Natsuki alone in the Prison Barrier as she murmured, "A-Ye...!"

William found Sentouki Aya, the imprisoned Witch of the Scribe, and offered to recruit her. He left her with a choice between joining him willingly or having her memories altered.

• Sentouki Aya woke when she heard footsteps in the Prison Barrier and wondered who had come to find her.
• William passed through Aya’s cell door and introduced himself as someone who had come to discuss her.
• Aya suspected Nangong Natsuki had sent William to obtain the Library’s knowledge in her mind, but William said he wanted that knowledge for himself.
• William explained that Aya could abandon her plans and join him or have him alter her memories before she joined.
• Sentouki Aya laughed and showed no belief that William could force her to comply.

William shared his memories with Sentouki Aya and offered her a choice after she awoke from the dream. He warned her that the Grimoire of Oath could not fulfill her wish, leaving her to decide what to do next.

• William transferred his memories of the world to Sentouki Aya, then waited for her to choose her course.
• Sentouki Aya awoke, joined William for tea, and learned how much the world had changed during her six years in prison.
• Sentouki Aya recalled Gada's overwhelming power and questioned whether her plan could ever affect monsters like the True Ancestors.
• William told Sentouki Aya that the Grimoire of Oath could not eliminate every demon's magic because each True Ancestor had a Beast Vassal able to counter it.

William altered Sentouki Aya’s thoughts and sent her unconscious to Nangong Natsuki’s home, then returned to reassure Natsuki that Aya was alive. He had also copied Aya’s magical knowledge, including the Grimoire of Oath, and left eager to see her reaction when she woke.

• William warned Sentouki Aya to make her decision, but she remained unwilling to abandon her ambition.
• William used golden spiritual threads to alter Sentouki Aya’s thoughts and pour new information into her mind.
• William copied Sentouki Aya’s magical tomes and learned that the Grimoire of Oath erased an existing spell by overlaying it with stronger magic.
• William sent the unconscious Sentouki Aya to Nangong Natsuki’s home and left the prison.
• Nangong Natsuki feared Aya was dead, but William reassured her that Aya was sleeping at home, and Natsuki thanked him.

William used the Star Spirit’s power to destroy the demon contract binding Nangong Natsuki and transform her Golden Knight guardian. Back at the Nangong family home, Natsuki found Sentouki Aya serving William tea in a maid outfit and demanded to know what was happening.

• William put Nangong Natsuki to sleep and drew out a parchment contract made from the Star Spirit’s power and a blank page from the Book of Worlds.
• The Golden Knight appeared and attacked William and Nangong Natsuki as William’s parchment stopped its machinery.
• William shattered the contract, breaking apart the Golden Knight’s black armor and revealing pure white armor beneath.
• Nangong Natsuki returned to her real body at the family home and watched Sentouki Aya serve tea to William in a maid outfit.
• Nangong Natsuki asked what was going on, and Sentouki Aya said that serving William was her daily work.

Nangong Natsuki confirmed that William had made Sentouki Aya his devoted maid, and William ordered Aya to return to the Library and gain control of its forces. Meanwhile, Island of Gen'ei’s leaders worried that the Spirit King had stayed after the Feast of Blazing Light and might have discovered the island’s secret.

• Nangong Natsuki confirmed she was awake and saw Sentouki Aya serving William as a maid.
• William told Sentouki Aya to return to the Library, make an excuse for her escape, and prepare to take control of its forces.
• William urged Sentouki Aya to talk things through with her daughter, and she agreed.
• Lan Yu Xian Zhai questioned his secretary about the Lion King Agency’s response to the Spirit King remaining on the island.
• A young entrepreneur suggested the Spirit King might have learned that Island of Gen'ei was the Altar of Cain, prompting another official to deny it.

Lan Yu Xian Zhai’s faction discussed whether the Spirit King might be interested in Island of Gen'ei and considered pledging themselves to him for protection and influence. Lan Yu agreed to seek a meeting through Nangong Natsuki, his daughter Aiba Asagi’s homeroom teacher.

• A young entrepreneur argued that the Spirit King might be interested in Island of Gen'ei because of his ties to powerful figures and showed footage of his battle during the Feast of Blazing Light.
• The young entrepreneur pointed to Aldikia’s continued rule by the Lihavain Royal Family as evidence that the Spirit King could coexist with human governments.
• A middle-aged man proposed pledging the faction to the Spirit King to gain a powerful backer and displace the Yase Faction.
• The young entrepreneur suggested that Aiba Asagi’s status as the Priestess of Cain could rival that of Aldikia’s First Imperial Princess, prompting Lan Yu Xian Zhai to consider the plan.
• Lan Yu Xian Zhai decided to contact Nangong Natsuki and request a meeting with the Spirit King.

Lan Yu Xian Zhai met William at Akagami Academy and offered to help him take control of the Island of Gen'ei. William considered whether to accept the offer and turned to Nangong Natsuki as he prepared to decide.

• Nangong Natsuki arranged an immediate meeting between Lan Yu Xian Zhai and William at the faculty office.
• William asked Lan Yu Xian Zhai why he had come, and Lan Yu Xian Zhai asked whether William intended to take control of the Island of Gen'ei.
• Lan Yu Xian Zhai offered to help William take charge of the island quickly in exchange for removing his political rivals.
• William weighed the advantages of using a local power to manage the island and turned to Nangong Natsuki.

William agreed to let the Aiba family lead the Island of Gen'ei publicly while Nangong Natsuki commanded its armed forces. After Aiba Xianzhai asked William to cure his wife's terminal illness, William agreed and prepared to teleport to the hospital with him.

• Nangong Natsuki described the Aiba Faction as unusually honest, and William accepted Aiba Xianzhai's terms for joining his ranks.
• William offered the Aiba family public authority over the Island of Gen'ei and assigned Nangong Natsuki to lead its armed forces.
• Nangong Natsuki prompted Aiba Xianzhai to ask William to cure his wife, who had a terminal illness.
• Aiba Xianzhai knelt and begged William for help, and William agreed to treat his wife as a welcome gift.
• Nangong Natsuki left to find someone while William and Aiba Xianzhai prepared to teleport to the hospital.