Chapter Summaries

Serafall proposed a game between the new generation after the prominent devils showed contempt toward Sona, and Sirzechs agreed to arrange a match featuring six young devils. Theodora revealed his engagement request to Sona and challenged Su Yang to compete for the right to pursue the position of Sitri’s Next Head.

• Serafall defended Sona and suggested that a victory in a game could silence the devils’ objections.
• Sirzechs proposed a match between Rias Gremory, Sona Sitri, Sairaorg Bael, Theodora, Astaroth, and another young devil as an exhibition for Rating Game enthusiasts.
• An old-generation devil mentioned that the match could settle the engagement between Sona and Theodora, and Sona confirmed to Su Yang that the engagement had been arranged.
• Theodora stated that he had requested an engagement with Sona and that the head of the Sitri family had accepted.
• Theodora challenged Su Yang to establish a contest for the right to compete for the position of the Sitri family’s Next Head.

Su Yang accepted the competition for Sona’s hand and learned that Theodora was his opponent, while a sign-in task called for Theodora’s elimination. After the matches were set, Su Yang turned to the Protector Squad and attacked a devil who challenged its existence.

• Su Yang agreed to face Theodora in the competition for Sona and noted that his injuries would heal before the matches began.
• Sirzechs announced the first-round pairings: Sona versus Theodora, Rias versus Jedah, and Sairaorg versus Siegfried.
• Su Yang received a Diamond Plot Sign-in task to wipe out Theodora and his Servants within 60 days.
• After Rias, Sona, and the others left, Su Yang presented the Four Great Satans with a list of powerful devils accused of serious crimes.
• An old-era devil questioned the necessity of Su Yang’s Protector Squad, and Su Yang attacked him with a Golden Sword.

Su Yang exposed Lauren Naberius’s alleged crimes and invoked Underworld law to judge him, then used his power to reveal the Naberius family’s hidden experimental site. The chapter left the assembled devils staring at the horrific underground evidence as Su Yang’s array restrained those involved.

• Su Yang dispelled Lauren Naberius’s Magic Circles and pierced his chest with a golden Word Spirit Sword, sealing his bloodline and magic power.
• Su Yang displayed documents accusing Lauren of selling addictive drugs, conducting illegal biochemical experiments, and devouring talented devils and yokai, then declared he would judge him under Underworld law.
• Lauren denied the accusations and called the documents forged, so Su Yang used the Sacred Heart of the World Dragon Balance Breaker to move the conference building above the Naberius family’s castle.
• Su Yang teleported away the uninvolved attendees and used the Underworld Great Array to pin those connected to the site to the ground.
• Su Yang tore open the earth and exposed the Naberius family’s underground experimental site, shocking the gathered devils with its bloodstained depths.

Su Yang exposed the Naberius family's crimes and used the Underworld Great Array to erase the family, then resumed the debate over the Three Great Factions' Protector Squad. When Anthony Androsia challenged him, Su Yang revealed Anthony's crimes, and Anthony responded by attacking.

• Su Yang broke the seals hiding evidence of crimes at the Naberius family's base and showed the assembled Devils what had happened there.
• Su Yang threw Lauren Naberius into the Underworld Great Array, whose blazing light erased him and the other guilty parties.
• Su Yang led the Devils to more Naberius experimental bases, and the Underworld Great Array wiped out the family.
• Su Yang reopened discussion of the Protector Squad, and Anthony Androsia stepped forward to object.
• Su Yang displayed Anthony's crimes, prompting Anthony to unleash demonic power and form Magic Circles.
• Su Yang activated the Magic Ban Domain to counter Anthony's attack.

Su Yang used his power to stop Anthony from attacking and handed the captured devil to Grayfia. With the Four Great Satans backing his authority, Su Yang opened the meeting agenda to investigate and punish wrongdoing.

• Su Yang transformed into Kurma Incarnation: Overlimit and confronted Anthony with his Holy Sword.
• Anthony tried to attack Su Yang, but Su Yang used the Evil Eye King of Space-Time Domination to freeze him.
• Su Yang stabbed Anthony with the Golden Sword, then handed him over to Grayfia rather than killing him.
• Sirzechs, Ajuka, and Serafall affirmed Su Yang’s authority to act against illegal activity across the three factions.
• The devils waited for Falbiwen Asmode’s response after the other Great Demon Kings had stated their positions.

Su Yang used the Golden Swords to judge the Underworld’s high-ranking devils, exposing those guilty of serious wrongdoing and clearing the rest. He left the shaken survivors to continue the meeting, where they reached a conclusion and awaited his response.

• Su Yang announced that only the guilty would be judged and activated the Golden Sword’s power.
• The system rewarded Su Yang with Shiro Shuby for completing the Underworld upheaval sign-in.
• Su Yang sealed the demonic power of suspects and investigated their records, using evidence to expose those who denied their crimes.
• After an hour, Su Yang declared the remaining high-ranking devils innocent of serious offenses, relieving them.
• The devils discussed the agenda and reached a conclusion, then one devil stood to ask Su Yang about it.

The political factions challenged Su Yang to a promotional match against Emperor Dihauser Belial, and Su Yang accepted. After the meeting, Su Yang dealt with Kisesu Itsuo and Diorio before heading out, expecting Ajuka to have something to tell him.

• The factions proposed a match between Su Yang and Dihauser Belial to demonstrate the Protector Squad’s strength, hoping to use the outcome as leverage against Su Yang.
• Su Yang accepted the match and agreed to hold it after the younger generation’s tournament, while Ajuka appeared reassured by his decision.
• The meeting concluded after the attendees discussed operational plans and other matters.
• Su Yang left the meeting and found Kisesu Itsuo and Diorio still there, praising his handling of the incident.
• Su Yang struck Kisesu Itsuo and Diorio with lightning and berated them for their behavior and lack of consideration.

Su Yang assigned Kisesu Itsuo and Diorio to train incoming recruits, then arranged for Sairaorg to train with Issei Hyoudou. After giving the group instructions, he went to speak with the green-haired Demon King, who had been signaling him.

• Su Yang told Kisesu Itsuo and Diorio to keep working until their replacements and recruits were trained, and said Vali would return from The Khaos Brigade.
• Su Yang told Diorio that Rint, the inheritor of Hapogga's Longinus, would soon intern with him.
• Su Yang invited Sairaorg to train with Issei Hyoudou, the Red Dragon Emperor, in Gremory Territory the next day.
• Su Yang noticed the green-haired Demon King signaling him and went over to ask what he needed.

Ajuka confronted Su Yang for using the Underworld Great Array without permission, then told him he would soon have more work. Odin arrived and gave Su Yang a book of Norse magic and formulas that Sirzechs and the others had requested for him.

• Ajuka questioned Su Yang about how he had learned to use the still-under-construction Underworld Great Array, and Su Yang blamed its poor security.
• Ajuka gave up arguing and told Su Yang that an important matter would keep him busy.
• Asachel introduced Odin, who praised Su Yang for defeating the White Dragon Emperor.
• Odin gave Su Yang a book containing Norse magic and most of its formulas, explaining that Sirzechs and the others had asked him for it.
• Su Yang accepted the book and learned that the leaders considered such resources appropriate for the future of the Three Realms.

Su Yang thanked Odin for agreeing to share information, then joined Serafall and Odin in a teasing exchange about Magical Girl Milky and romance. Serafall denied having feelings for Su Yang and hurried away, leaving the others to interpret her reaction as an admission.

• Sirzechs explained that Odin had agreed to share information with Su Yang in exchange for a damaged Underworld Great Array and knowledge gathered about the Underworld.
• Su Yang sincerely thanked Odin, who praised him and suggested he might become the strongest human without first being a candidate.
• Odin asked Serafall about her usual Magical Girl clothes, and Serafall tried to transform but found that nothing had changed.
• Su Yang said Magical Girl Milky had agreed to be only his Magical Girl, making Serafall blush as she recalled the disc’s story.
• Odin teased Valkyrie Roseweald about finding a Hero and suggested she ask Su Yang for advice.
• Serafall declared that she had not fallen for Su Yang and that her heart belonged to Sona-chan, then fled as the others took her denial as an admission.

After leaving the meeting, Su Yang found Rebel upset about her brother Raiser’s lingering depression and offered to help him recover. Rebel agreed to let Su Yang visit the Phoenix Family estate, where she welcomed him the next morning.

• Su Yang slipped away after advising Roseweald to show Odin her feelings through sincere actions.
• Su Yang found Rebel drinking juice alone in the corridor and asked what was troubling her.
• Rebel explained that Raiser had remained depressed since his defeat by Su Yang.
• Su Yang said he had a way to help Raiser pull himself together and arranged to visit the next morning.
• Rebel welcomed Su Yang at the entrance to the Phoenix Family estate the following day.

Su Yang brought Sairaorg to the Phoenix estate to help Rebel’s brother Raiser recover his spirit. After sealing Raiser’s powers and stopping him from escaping, they set off with Sairaorg carrying him away for training.

• Rebel led Su Yang and Sairaorg to Raiser’s room and explained that Raiser had stayed inside since being injured.
• Sairaorg kicked down Raiser’s door, and Raiser tried to flee when he saw Su Yang.
• Su Yang’s Word Spirit Sword pierced Raiser and sealed his bloodline and powers.
• Raiser called for Rebel to save him, but she urged him to cooperate with Su Yang and Sairaorg.
• Su Yang told Sairaorg to take Raiser away, and Sairaorg carried him off for training.

Su Yang brought Tanning to train Sairaorg and Raiser, then watched Raiser and Issei endure harsh exercises at Tanning’s Snow Ridge. Rebel thanked Su Yang for helping her brother and asked about his duties, while Su Yang revealed that she was still serving as her brother’s Servant.

• Tanning arrived at the Phoenix Family estate, and Su Yang entrusted him with training Sairaorg and Raiser.
• The next day, Raiser fled an ice dragon’s breath while Issei fought two Maou-class dragons at Tanning’s Snow Ridge.
• Rebel cheered Raiser on as Su Yang remarked that the training seemed to have made him more cheerful.
• Rebel asked whether Su Yang was neglecting official duties, and he said Kisesu Itsuo and Diorio handled much of the work.
• Su Yang asked Rebel whether she was still her brother’s Servant.

Su Yang asked Rebel to become his Servant and offered her his golden Familiar Chess Piece, which could grant her a powerful bloodline. Rebel accepted the piece and it fused with her, leaving her newly reincarnated as Su Yang’s Servant.

• Su Yang learned that Rebel had exchanged herself into her mother’s Servant after awakening.
• Su Yang asked Rebel if she was willing to become his Servant, and she agreed shyly.
• Su Yang gave Rebel his golden Familiar Chess Piece and explained that it could evolve her bloodline to the level of a Progenitor Phoenix or beyond.
• Rebel accepted the Familiar Chess Piece, which merged into her body, and Su Yang asked if she was all right.

Su Yang completed Rebel's reincarnation and received the Wheel of the Conqueror, while Shuby joined him in Tanning's territory. A spatial rift then opened above the island, bringing two mysterious girls into view as Tanning and Issei prepared to face them.

• Su Yang received the Wheel of the Conqueror after Rebel absorbed the piece and completed the sign-in plot.
• Shuby, now an Ultimate Shiro at the High-tier Demon Lord level, sat in Su Yang's lap with a Pet Egg.
• Rebel objected to Shuby leaning against Su Yang, and Shuby dismissed her as a humanoid turkey creature.
• A spatial rift tore open above Tanning's territory, darkening the sky and cracking the island's barrier.
• Tanning and Issei Hyoudou confronted a black-haired woman and a silent purple-haired girl who appeared through the rift.

Su Yang recognized Ingvild Leviathan and Nyx, Goddess of Night, and received a sign-in challenge to subdue Nyx. Nyx made Ingvild sing to suppress the dragons, leaving Issei unable to stay aloft as he fell from the sky.

• Su Yang recognized Ingvild Leviathan and Nyx, Goddess of Night, and triggered a Diamond Plot Sign-in to subdue Nyx within 180 days.
• Nyx said she had come for Rama and dismissed Tanning and Issei Hyoudou.
• Nyx ordered Ingvild to sing after revealing that she had implanted a brainwashing Magic Formula in her.
• Ingvild sang, suppressing Issei’s strength and dispelling the Armor of the Red Dragon Emperor.
• Issei lost control and fell from the sky.

Nyx’s dragon-suppressing Longinus brought Tanning, Issei Hyoudou, and the other dragons to the ground, but it did not affect Su Yang. Su Yang unleashed Kurma Incarnation: Overlimit and attacked Nyx, only to discover her outfit made her nearly invulnerable.

• Ingvild’s [Song of the Emerald Sea of the End] suppressed the dragons in Tanning’s territory, while Su Yang assimilated the invading power and remained standing.
• Su Yang told Shuby to protect Rebel and assured Rebel that he would face Nyx.
• Nyx watched Su Yang approach, expecting the dragon-slaying power to leave him unable to fight.
• Su Yang released Kurma Incarnation: Overlimit (Juggernaut Drive), but Ingvild’s song had no effect on him.
• Su Yang struck Nyx with a probing beam, but she emerged nearly unharmed and revealed that her special outfit prevented him from hurting her.

Su Yang confronted Nyx, who believed her Impure Dragon Fall Robe made her invulnerable to him. He used a Word Spirit Sword and the Chains of Heaven to capture her, leaving Nyx struggling to break free.

• Nyx revealed that her Impure Dragon Fall Robe resisted attacks from impure people and dragon clan members, and confirmed that she had formed the Hell Alliance Leader.
• Su Yang used his abilities to uncover the robe’s nature and forged a sealing sword specifically designed to target Nyx.
• Nyx dismissed Su Yang’s weapon and invited him to attack, confident that he could not harm her.
• Su Yang used the Chains of Heaven to capture Nyx, who recognized the Anti-God Noble Phantasm and tried to break free.

Su Yang defeated Nyx, Goddess of Night, and secretly sealed her inside the Sacred Heart of the World Dragon. After freeing Ingvild from brainwashing, he completed a sign-in on her and gained the Destruction MAX trait, then left the others as they recovered.

• Su Yang used Narasimha to defeat Nyx and made it appear that she had vanished, while sealing her inside the Sacred Heart of the World Dragon.
• With Nyx gone, Ingvild was freed from her brainwashed state and collapsed, and Su Yang caught her.
• Su Yang completed a sign-in on Ingvild and obtained the Demonic Power Trait—Destruction MAX.
• Issei Hyoudou, Tanning, and Sairaorg recovered from Nyx's attack, while Raiser reacted to Su Yang's victory over a deity.
• Su Yang told the others to recover and train, then left to attend to something.

Su Yang brought the sleeping Ingvild to a hospital, where Asachel arrived eager to examine her Sacred Gear. Grayfia, Serafall, and Ajuka also came, and Ajuka warned Su Yang about the Hell Alliance Leader, an organization of underworld-type gods whose plans remained unclear.

• Asachel rushed into the hospital to investigate the new Sacred Gear user, and Su Yang kicked him out for making noise near a patient.
• Su Yang told Asachel that Ingvild was one of his people and that any tests would have to wait until her sleeping sickness improved.
• Grayfia and Serafall raced each other down the corridor and reached Su Yang at the same time before visiting Ingvild.
• Ajuka came to speak with Su Yang about the Hell Alliance Leader, which Tanning had mentioned after the attack.
• Su Yang said Nyx believed the group consisted of allied underworld-type gods who were looking to cause trouble, though their purpose was still unknown.