Yuuya is a middle-aged adventurer without talent. As hardworking as he is, he spends his days garnering little reward. One day, his memories of being a corporate slave return and he realizes that he has reincarnated into a world of the video game he had been obsessed with in his previous life. As a bonus for resetting his level, his stats rise and the limits increase to the maximum. As a result, his life receives a turnaround. Using his knowledge of the game as well as his 10 years of experience as an adventurer, all will be in his grasp using the skills he has forged. At last, in his third life, the time has come for the old man to be rewarded for his efforts.

Senoo Kaoru falls in love with an attractive freshman he meets at the library, Shinohara Akira. Shinohara Souya is unable to let go of the memory of his beloved. And Akira is a lonely boy starving for love. No matter how strongly they wish for it, these feelings wrenching their hearts can never be requited. A secret past binds them together; and the shocking truth will be revealed in the end. What fate awaits these beasts hungry for love, in this tragic story by Hakutou Noriko?

"The Adventure of Allen The Hero," is the novel written by our protagonist. Overwhelmingly popular and widely read, everyone was eagerly awaiting the conclusion of the story. Despite being told he doesn't have much time left to live, he put his life on the line to complete the series. Unfortunately, his lifespan ran out just as he finished writing the final volume— but… "Why did I become such a nobody character?" He unexpectedly transmigrated into the very novel he wrote. And he was put into the body of Will, an underdog mob character from the early part of the novel. The eldest son of a noble family soon to fall into ruin, he's a character with no talent in magic, with a miserable future ahead of him. It was the worst starting point, but that's no problem for him, the author. As the writer of the original work, he knows all when the quests and events occur, where the strongest magical items are hidden, all the characteristics and weaknesses of the monsters, and the secrets of the world itself. In order to change his doomed fate, Will will use his knowledge of the original story and aim to become the strongest in the world. "I’ll change the future. That’s the reason why I have all this knowledge." Using his story knowledge as a cheat to change the fate of a mob character that will even have the hero in awe, he’ll gain unparalleled power in this world—! (Source: Hyke Comic, translated)

One day, dungeons suddenly appeared. Humans with awakened skills set out to explore these dungeons in search of treasure. Our protagonist, Saeki, having no skills, was considered useless. In order to earn enough money for the treatment of his little sister with an incurable disease, he decided to become an adventurer anyway. But Saeki had a secret. In his previous life he was the most powerful mage in the world. Since his reincarnation, he had to level up to regain his former powers. This is the story of an incompetent who will turn the world upside down with his growing power! (Source: Hyke Comic, translated)

The spinoff series follows Yukina, Nagisa, and Kanon in their everyday lives in middle school

Kazuki Ishii has his life turned upside down — and is driven to suicide — after getting caught up in the romantic entanglements of his friend Teruhito Amada, who is wildly popular with the opposite sex, like the hero of a romantic comedy. However, a miracle occurs, and time is rewound back to the morning of his high school entrance ceremony. In his second chance at life, Kazuki tries to keep a low profile, avoid making friends, and live a peaceful life. But for some reason, Meiko Hikata — Amada’s childhood friend and a cool beauty known as the “Ice Empress”—begins to take an interest in him. (Source: Natalie, translated)

The strongest onmyoji in history, the master of all spiritual techniques and served by the Twelve Heavenly Guardians as his shikigami, was tragically betrayed and killed. However, on the verge of death, he managed to transmigrate his soul to reincarnate in another world. He became Wayne, the third son of a high-ranking aristocrat. In this world, magic was commonplace and status is determined by one's magical ability. Of course, no one knows anything about spiritual powers or shikigami here. Wayne had zero mana and had no talent for magic. However, he retained his onmyoji powers and the memories of the spiritual techniques from his previous life. With his mastery of spiritual powers and his shikigami servants, the incompetent Wayne will accomplish the impossible. The adventure of the most powerful onmyoji, beyond the comprehension of the people in a magical kingdom, begins now. (Source: Hyke Comic, translated)

"A World Where Chastity is Reversed"—A dream world where the male-to-female ratio is 1:20, women have stronger sexual desires, and precious men live a smooth life protected by their bodyguards. Fifteen years have passed since Ikuto Ichise was reincarnated into this world, which should have been a guaranteed harem, but for some reason, he isn't popular. Ikuto laments that it must be because his bodyguards are all handsome men, and especially his childhood friend Rui Toosaka, who is particularly high-spec... but in reality, the bodyguards are beautiful girls disguised as men! Completely unaware, Ikuto is overly close and unguarded, making every girl feel like they have a chance. As he unintentionally forms an oblivious harem, Rui, who wishes to be seen as a girl, reveals everything to him—!? The curtain rises on a romantic comedy harem story where my demand is enormous, and it's always my peak popularity period!

In this world, when you turn 12, God gives you "talent"... While everyone else was given the cool "talents" of "Swordsman" and "Witch," the talent that the main character Rivele received was "Effort" that nobody had ever heard of...!? On the other hand, his childhood friend Anna received the skill "Dragon Knight," one which is destined to be used in battle. Rivele resolves, "I will protect Anna." Thus, to keep her away from battle, Rivele aims to be the strongest in the world with his overwhelming effort!! (Source: Earth Star Entertainment, translated)

An anthology of Sword Art Online "what if" short stories by various authors and illustrators.