Chapter Summaries

Leo returned from the Dimensional Gap to the Underworld and contacted Sona Shitori, who told him how the Old Satan Faction had attacked Kuoh Academy while he and his Peerage were trapped elsewhere. The Three Factions defeated the attackers, and Leo learned that Sirzechs and Serafall had overwhelmed the old Maou’s descendants.

• Leo arrived in the Underworld with Kanna and Stella and began preparing to contact his allies.
• Sona Shitori contacted Leo, confirmed he was safe, and explained that the Old Satan Faction had attacked Kuoh Academy after the fog transported Leo and his Peerage away.
• Sona told Leo that Vali Lucifer had joined Khaos Brigade and that the faction included the Old Satan Faction, the Hero Faction, and other extremist groups.
• The Gremory and Sitri Peerages fought the descendants of the Original Beelzebub and Asmodeus while Sirzechs battled Vali and Serafall faced the descendant of the Original Leviathan.
• Sirzechs defeated Vali and the descendant of the Original Beelzebub, while Serafall defeated the descendants of the Original Leviathan and Asmodeus, ending the attack.

Leo learned that the Old Satan Faction’s four leaders had escaped, but accepted Sirzechs and Serafall’s decision to spare them. He returned to the estate, where his peerage members were recovering, and prepared to meet with them.

• Sona told Leo that the Old Satan Faction had been defeated, though all four descendants of the Original Maou had escaped, and that Leo’s peerage had beaten the Hero Faction and returned to Chiba.
• Sona said Leo’s peerage members were recovering at the estate, and Leo left to see them with Kanna and Stella.
• Miyamoto Musashi welcomed Leo back and reported that the estate was safe and most of the injured girls were resting.
• Ravel, Ram, and Rem greeted Leo; Ravel revealed that Ram and Rem had suffered serious injuries but recovered after receiving Tears of the Phoenix.
• Leo asked about Yukino and the others, then invited everyone to the living room to talk.

Leo returned to the manor and heard Ravel recount how the Eligos Peerage fought the Hero Faction while he battled Cao Cao. Yukino had decisively defeated Sharon, and the account left Leo considering whether Sharon might later gain power and threaten Yukino again.

• Leo reunited with Yukino, Asuna, Utaha, and Mahiru, checked on their recovery, and asked Ravel to explain the battle.
• Ravel described how the Eligos Peerage faced the Hero Faction’s fighters in separate duels while the other members stayed back out of arrogance and confidence in their own strength.
• Ravel explained that Yukino had grown far stronger since her previous fight with Sharon, mastering Absolute Demise and reaching the High-Class Devil level and Balance Breaker.
• Yukino defeated Sharon in a single exchange without activating Balance Breaker, freezing her solid with the Ice Princess’s breath.
• Yukino believed Sharon could no longer trouble her, but Leo warned that Sharon might gain forbidden power and become a threat again.

Yukino, Utaha, and the Eligos Peerage defeated the Hero Faction’s leading fighters and twelve of Leonardo’s monsters, but the last Jabberwocky remained standing. Yukino told Leo that nobody had defeated it.

• Yukino defeated Sharon, and Utaha defeated Heracles before both joined Mahiru and Asuna against Siegfried and Jeanne.
• Yukino and Utaha activated their Balance Breakers, helping Mahiru burn Siegfried to ash and allowing Asuna to wound Jeanne severely.
• Georg used Dimension Lost to evacuate Hero Faction members while Leonardo unleashed his Balance Breaker and created twelve Bandersnatches and a Jabberwocky.
• The Eligos Peerage exhausted their strength and defeated the twelve Bandersnatches, but they could not overcome the remaining Jabberwocky.
• Leo praised the girls’ efforts and asked who had defeated the last Jabberwocky, and Yukino said it had not been defeated.

Leo learned how the Eligos Peerage survived the Jabberwocky and escaped the Different Dimension, then praised the girls for winning their hard-fought victory. After settling matters at home, he left for Kuoh Academy to meet Sirzechs and visit his younger sister.

• Ravel explained that she directed the Eligos Peerage to collapse the unstable Different Dimension and banish the Jabberwocky, while Ram analyzed Dimension Lost's mist to locate the Human World and guide their escape.
• Leo praised Ravel's risky plan and Ram's skill, and acknowledged that the injured Eligos Peerage had defeated the Hero Faction and returned with everyone alive.
• Leo reminded the girls that their training had helped them overcome their former helplessness and win freedom and peace through their own strength.
• Ravel told Leo that Sirzechs had asked him to go to Kuoh Academy, and Leo assigned Ravel to look after Kanna and Stella while the others rested or handled their usual duties.
• Leo asked Miyamoto Musashi to watch over the estate, then used the basement magic circle to travel to Kuoh Academy.

After returning from the Dimensional Gap, Leo told Sirzechs and the others about meeting Ophis and Great Red, while keeping his agreement with Ophis secret. He revealed that he had reached Maou-Class, and Sirzechs encouraged him to keep growing toward becoming the next Maou.

• Leo returned to the Occult Research Club and described how he had escaped the Dimensional Gap with Ophis's help after recruiting Kanna and Stella as retainers.
• Leo told Sirzechs, Rias, and Sona that Ophis had fought Great Red because she wanted to reclaim the Silent World, but concealed her plan to become his Queen and give him power.
• Sirzechs warned everyone to keep the Dragon Gods' conflict confidential and said he would discuss it with the other Maou.
• Leo spread his twelve Devil Wings, revealing that he had reached Maou-Class and astonishing Rias, Sona, Grayfia, Akeno, and Tsubaki.
• Sirzechs praised Leo's strength and encouraged him to keep growing, while Leo privately recognized that he was still below Sirzechs and Ajuka.

Sirzechs decided to recommend Leo for promotion to Ultimate-Class Devil after recognizing his strength and achievements, and planned to position him as a possible successor to the Maou. He also recommended promotions for Leo’s peerage members, while considering how Rias could help rebuild the Eligos territory.

• Sirzechs saw Leo’s twelve wings and concluded that he was powerful enough to represent the Devils and potentially succeed him as Maou.
• Sirzechs reasoned that Leo and the Eligos Peerage had outgrown the Golden Generation Debut Match after repelling the Hero Faction and earning major achievements.
• Sirzechs announced that he would recommend Leo for promotion to Ultimate-Class Devil and recommend Yukino Yukinoshita, Mahiru Shiina, Utaha Kasumigaoka, Asuna Yuuki, Ram, and Rem for Middle-Class Devil examinations.
• Rias, Sona Shitori, and the others were stunned, then accepted that Leo’s strength and record qualified him for promotion.
• Sirzechs told everyone to prepare for the formal promotion ceremony and urged Rias to work toward her own goals.
• Sirzechs considered sending Rias to help rebuild the Eligos Territory so she could get closer to Leo.

Leo told his peerage that they would take the Middle-Class Devil promotion exam, and Ravel explained that their strength, fame, and achievements had earned them the opportunity. The others headed to the study to prepare, while Leo wondered where a certain Princess had gone.

• Leo announced that his peerage would need to pass written and practical tests to become Middle-Class Devils.
• Ravel explained that the peerage's past battles and accomplishments had made them qualified for promotion despite their short time as Devils.
• Leo assured the girls that their strength and knowledge should make passing easy, but Yukino, Asuna, Utaha, and Mahiru went to the study to prepare anyway.
• Rem worried that she might fail both tests, so Ram reassured her and agreed to study with her.
• Ravel promised Leo that she would organize the peerage's exam preparation, while Kanna kept asking what a Middle-Class Devil was.
• Leo noticed that a Princess had quietly left the living room and wondered where she had gone.

Leo helped Stella find a way to pursue her dream of restoring the Vermis Kingdom, and she began rebuilding her life among the Eligos Peerage. After his servants became Middle-Class Devils and he was invested as an Ultimate-Class Devil, Leo prepared to give his answer about his Queen piece.

• Leo told Stella she could rebuild the Vermis Kingdom in the Underworld and encouraged her to learn and grow strong enough to achieve it herself.
• Stella began studying and working hard, while Kanna settled into school and made friends; both became part of the Eligos household.
• Yukino Yukinoshita, Asuna Yuuki, Utaha Kasumigaoka, Mahiru Shiina, Ram, and Rem passed the Middle-Class Devil promotion exam.
• Leo was invested as an Ultimate-Class Devil and received permission to return to Eligos Territory to rebuild it; his Debut Match was canceled after the Three Factions made peace.
• Leo took out his Queen piece, preparing to give his answer.

Leo agreed to help Ophis drive Great Red away in exchange for her leaving Khaos Brigade, then accepted her Queen piece and became a Demon God. After Ophis gave him nearly all her power and the concept of Infinity, Leo set out with her for the Dimensional Gap to confront Great Red.

• Leo met Ophis at the camp and agreed to help her deal with Great Red, provided she left Khaos Brigade and stopped supporting it.
• Ophis accepted Leo's condition and merged her Queen piece into her body, triggering a powerful transformation in Leo.
• Leo gained vast Demonic Power, became a Transcendent with Divinity, and took on the identity of a Demon God.
• Ophis transferred nearly all her power and the concept of Infinity to Leo, leaving herself with only one-tenth of her strength.
• Ophis told Leo that he should now be able to match Great Red, and Leo resolved to test his strength.
• Leo and Ophis opened a passage to the Dimensional Gap and stepped through to confront Great Red.

Leo, a transmigrator who had spent a year as an apprentice in the Loki Familia, learned that he had passed his observation period and hurried to receive Falna. On his way to the Chief God's Divine Room, he stopped to watch a girl practicing with a rapier, and their eyes met.

• Leo woke early in Twilight Manor and greeted Raul while washing up.
• Raul reminded Leo that he had lived with the Familia for a year, and Leo recalled how he had arrived in the Dungeon's 18th Floor and been rescued by an angel.
• Leo remembered that he had stayed as an apprentice member while the Loki Familia verified his identity.
• Leo told Raul that the captain had approved his joining, so he planned to ask the Chief God to inscribe his Blessing.
• Leo hurried toward the Central Tower, then stopped in the courtyard to watch a girl practice sword techniques.
• The girl finished her practice, turned toward Leo, and met his gaze.

Leo met Ais before going to Loki to receive the Blessing of the Gods and officially join the Loki Familia. Loki welcomed him as family, granted him the blessing, and scrutinized the Divine Script on his back.

• Leo greeted Ais as she finished her morning sword practice, and she said she still was not strong enough.
• Ais confirmed she planned to visit the Dungeon, and Leo reminded her to return early.
• Ais congratulated Leo on receiving his blessing and agreed to teach him swordsmanship once he grew stronger.
• Leo entered Loki's room in the Central Tower, where the hungover goddess teased him before preparing to grant his blessing.
• Loki told Leo he was family and would not question his past, then inscribed her Divine Script onto his back with her blood.
• Loki studied the Divine Script on Leo's back with a glint in her eyes.

Leo received his Falna from Loki and discovered he had the magic Meteor Dance and an unreadable skill called People of the Alien Star. After hiding his status, he went to meet Finn, who had summoned him.

• Loki inscribed Leo's Falna and translated his status, which showed all abilities at 10, the magic Meteor Dance, and an undecipherable skill.
• Loki locked Leo's status and warned him to keep the mysterious skill secret from curious gods.
• Leo understood the skill's text as People of the Alien Star, with the effects “Permanent” and “All ability limits removed,” then destroyed the parchment.
• Leo went to Finn's office, where the Loki Familia captain welcomed him.

Leo formally joined the Loki Familia after a year of observation and told its leaders he wanted to enter the Dungeon. Finn approved his plan to explore the first few floors alone, while Riveria and Gareth cautioned him to put his safety first.

• Leo greeted Finn, Riveria, and Gareth, who asked how he had settled into the Loki Familia.
• Finn asked Leo about his plans after receiving Loki’s Blessing, and Leo said he wanted to go to the Dungeon.
• Riveria warned Leo that his inexperience made the Dungeon dangerous, and Leo explained that he would stay on the first few floors.
• Riveria offered to have a senior adventurer accompany Leo, but he declined because he wanted to explore alone and avoid drawing attention.
• Finn approved Leo’s plan and reminded him to prioritize his safety.

Leo prepared for his first trip into the Dungeon and received weapons, shields, and healing items from his Loki Familia companions. After Ais gave him two exceptionally valuable panaceas, he left Twilight Manor for the Dungeon, promising to return soon.

• Leo packed for the Dungeon, taking an ordinary shortsword previously used by a Level 2 Familia member.
• Raul gave Leo a shield and a pouch of potions and antidotes collected by the Familia members.
• Leo accepted Raul's offer of future training and thanked the Familia for their gifts.
• Ais silently gave Leo a pouch containing two panaceas and told him to be careful.
• Leo left Twilight Manor for the Dungeon after saying he would be right back.

Leo registered as an adventurer with the Guild and returned to the Dungeon after a year away. He entered the first floor alone and encountered a goblin.

• Leo registered at the Pantheon as a Level 1 adventurer and identified himself as a member of the Loki Familia, drawing attention from the Guild staff and nearby adventurers.
• After completing registration, Leo walked to Babel Tower and descended into the Dungeon.
• Leo recalled that Ais had once brought him to the surface and resolved to explore and fight without anyone clearing the way or protecting him.
• Leo left the crowd and ventured alone down a pale-blue path on the first floor.
• A goblin emerged from the darkness and charged at Leo.

Leo cautiously explored the Dungeon, studying monsters before defeating them and collecting their Magic Stones. After adapting to the stronger groups on the 2nd Floor, he descended toward the 3rd Floor, intending to stop at the 4th and avoid the lethal risks of the 5th.

• Leo blocked a Goblin's attacks with Raul's small shield, studied its movements, then knocked it down and killed it with his shortsword.
• The Goblin's body vanished, leaving a tiny Magic Stone fragment, which Leo kept despite its low value.
• Leo fought Goblins, Kobolds, and other small monsters on the upper floors, using careful tactics and his high-quality shield and shortsword to stay safe.
• After finding the 2nd Floor more difficult because monsters were stronger and appeared in groups more often, Leo adapted and continued downward.
• Leo decided to explore no farther than the 4th Floor and never enter the 5th Floor while he was still a rookie.

Leo fought a kobold pack on Dungeon Floor 4, but the living Dungeon spawned more monsters and trapped him between two hordes. Choosing to face the danger, he awakened his magic and wiped out the kobolds, though he was left covered in wounds.

• Leo used his shield and sword to kill kobolds until the Dungeon cracked open a wall and spawned a larger pack behind him.
• Leo fled the horde, drank a potion to restore his stamina, and found more monsters blocking his route at a fork.
• Surrounded by kobolds, Leo recognized that adventuring meant accepting danger and cast his first spell, [Meteor Dance].
• Leo repeatedly fired meteors at the kobolds, then fought the survivors with his sword after they wounded him.
• Leo killed the final two kobolds with another casting of [Meteor Dance].

After surviving a Dungeon ambush on the 4th Floor, Leo recovered, considered the potential of his new magic and gathered the monsters’ drops. Despite knowing the 5th Floor was much more dangerous, he went down to take a look near its entrance.

• Leo realized that using magic repeatedly had nearly exhausted his mental strength, then healed his injuries with ordinary and high-grade potions.
• Leo reflected on how [Meteor Dance] had helped him defeat the Kobolds and wondered whether [People of the Alien Star] had removed limits on his magical potential.
• Leo collected the scattered Magic Stone fragments, Kobold claws, and Kobold teeth, then checked the time and approached the passage to the 5th Floor.
• Leo weighed the dangers of the 5th Floor against the protection his magic offered and decided to descend just to look near the entrance.

After surviving the Dungeon and testing himself on the 5th Floor, Leo decided his magic and abundant supplies let him explore more boldly. He returned to Twilight Manor after earning 21,100 Valis, where a familiar figure had been waiting for him.

• Leo reflected on his successful trip to the 5th Floor and concluded that combat magic and his plentiful potions let him venture deeper than he had thought.
• Leo exchanged his Magic Stone fragments for 13,000 Valis and sold his drop items for another 8,100 Valis.
• Leo bought clean clothes and showered at Babel Tower before heading back through Orario after dark.
• Leo reached Long Mansion, where the guards told him that someone had been waiting for him.
• Leo entered the courtyard and saw a familiar figure, understanding why the guards had teased him.