When Light is kicked out of the Concord of the Tribes, his former comrades instantly turn on him. Light escapes this diabolical act of betrayal by the skin of his teeth...only to find himself in the deepest part of the Abyss, the most dangerous dungeon in the realm! To avoid being eaten by carnivorous monsters, he uses the Unlimited Gacha, his sole magical skill. But where it previously only produced junk items, this time Mei—a gorgeous Level 9999 fighter in a maid outfit—springs forth! Fast forward three years and Light has carved out his own kingdom in this backwater dungeon, summoning more beautiful Level 9999 warriors who swear absolute fealty to him. Now a powerful Level 9999 Overlord himself, Light plans to ascend to the surface and take revenge on his betrayers one by one!

After waking from a long cryogenic sleep, high school student Akira Himegami finds himself in a world he no longer recognizes. The city lies in ruins from war, society is now governed by an organization called OWEL, and traditional marriage has been replaced by a new system known as "Elsie." As Akira struggles to comprehend this drastically changed future, a familiar figure appears before him—Yuugure, who bears a strong resemblance to his girlfriend Towasa. To his shock, Yuugure smiles gently and proposes: "Akira... please marry me." Confused by her sudden proposal, Akira agrees to travel with Yuugure, holding onto hope that somewhere in this world, the real Towasa is still alive. Along their journey, they encounter the evolving forms of love in this new era and reflect on what their bond truly means.

Konoha Satou has a dark history. After all, she spent her teen years writing self-indulgent fantasy romance fics-like her Dark History. But since she's become its most despicable villainess, remembering every last detail is now a matter of life-and-death. Having avoided the first couple of death flags, Satou's suddenly left in the dark when a mysterious stranger returns from the Lily Kingdom-a character she doesn't recall writing in the original script. Although Yomi claims to be her ally, can Satou really trust a character she knows nothing about in such a dangerous world?

"This party doesn't need an incompetent magician who can only use supportive magic. You're fired, Alec Ygret." Suddenly, Alec, a court magician who had joined the crown prince's party to help him conquer dungeons—was banished from the party. And not just the party, but the crown prince's harassment has banished him from the royal palace as well, and a friend from the "magic academy" approached Alec, who was at his wit's end. "Hey, Alec. Do you want to try to conquer the dungeon with us again?" And so, together with the friends he used to party with, Alec begins his second journey in life. This is the adventure story of a former court magician who had been abandoned. Four years ago, the "Lasting Period," a party of four that had been called "legendary," has gradually spread its name around the world.