The title says all ..

Subaru when getting transported, instead is teleported to a very large cave. And people are immediately bowing to him? Woah, the Isekai Dream experience is immediately setting course! Wait.. these people are fucked! How will he reintegrate the cult into society with their terrible reputation? Well not like he cares about them too much, but they're gonna bring down his rep as well!

Natsuki Subaru is a high school student who is suddenly summoned to another world...

Natsuki Subaru and Doreán Soren are two teenagers with contrasting lives and personalities who find themselves forcibly transported to another world, bound by fate and trying to survive as best they can in a universe that seems to come crashing down on them every day. Will they be able to rewrite history and change the fate that awaits them and their loved ones?

After three depressing months, Subaru finally moved on from his First love, Emilia. Wondering if he could ever find love again, Otto and Garfiel gave him an app that will pair him with his fated partner. With nothing to lose, Subaru left his fate to the hands of Lugunica's Love Line. (Vainglory if) (Modern AU) (Inspired from the Valentine's Disaster of Persona 5)

"A slightly different arc 3 retelling with Subaru taking a more active role in the Whale fight." But not really.

After dying to Elsa in the loot house, Subaru gains a slightly different ability. He's forced to take a longer view on events, as a single death will undo all the progress he's made. First two chapters don't really diverge from canon. Eventual web novel spoilers. New cover image is by u/Json25 on reddit!

What if Subaru came from a mixed racial background and was brought up in a unique way, not just as a recluse but a "Gopnik recluse".

Beatrice discovers what it means to love. She finds that these mysterious feelings are targeted at one person in particular.

'How my life changed when I was loved by the purest' - An twist in time can change a person's attitude by a fair shot. When Natsuki Subaru ends up befriending a shy Emilia, his first instinct is friendship rather than romantic attraction. of course, fate throws a curve ball at this change and poor Emilia sees that more can be achieved with Subaru. More than Friendship. (Love IF)

Subaru goes missing for a month. Low-Effort Oneshot.

Subaru's not able to sleep , but this time, his thoughts seem to be racing throughout his mind, they're going so fast he can't keep up with his brain. When morning comes, he doesn't feel a bitter sense of exhaustion like he usually does. No, he feels even more energetic than before. He feels a sense of... excitement? Subaru acts strange for the rest of the day. What's Going On...?

Subaru is about to pass into the shadow garden, half conscious yet still expecting an imminent RbD, but then he is yanked back from WoE's clutches. He sits up awake in his own body. Turns out his heart had stopped for a few minutes, but his soul hadn't passed on, resulting in a near-death experience. The camp realizes they could of prevented this. Natsuki Subaru Must NOT Die.

Natsuki Subaru working under the duchess Crusch Karsten was scolded after disobeying her. feeling down he set out the streets of the capital to unwind. however, after encountering a spa, he decided to get a massage. Little did he realize that this would set off a sequence of events that not even a person like him could have predicted. (Arc 3)

Rem manages to convince Subaru to let her travel with him after the White Whale battle. As of a result, she avoids being eaten by the Archbishop of Gluttony. As Rem travels with Subaru, she will learn many things that she wouldn't have in a comatose state. She will discover that the world is more complicated and sinister than she ever expected it to be.

Spoilers through the end of LN 14. Having read through arc IV is recommended; if you are anime only waiting for the second half of the second season is advised. Satella's personality gains a moment of dominance over the Witch of Envy, and as a result an 11 year old Subaru is summoned in the Ellior Forest with a similarly young Emilia.

Ruta de la Humildad: Subaru, aterrado por la idea de volver a ser asesinado por Elsa, acepta sus debilidades y deja todo en manos de Reinhard. Tras fallar a su promesa con la chica que lo salvó, lo único que le queda es sobrevivir en un mundo que desconoce. Para ello, tendrá que usar su conocimiento para reinventar los objetos de su mundo. ¿Pero acaso ha escapado de la muerte?

Humility If: Subaru, terrified by the idea of being slain again by the Bowel Hunter, Elsa, accepts his weaknesses and leaves everything to Reinhard. After failing his promise to the girl who saved him, all he has left is to survive in a world unknown to him. To do this, he will have to use his knowledge to reinvent the objects of his world. But, has he escaped the cycle of death?

Primitive they were, perhaps even barbaric. They played lip service to virtue while giving themselves fully to the embrace of decadence. So when their king died these unenlightened people, under command of a dragon, were ready to give their country away to whomever this creature desired. Subaru starts French revolution in Lagunica, and the world is burning. Inspired by Treachery If

A story where Subaru is born in Japan in the sonic universe. This version of Subaru is the reincarnation of Sonic and Shadow. He'll be a G.U.N. agent and free spirited as well. He'll be smart and he'll have his own gear. He'll have Sonic's speed and Shadow's chaos abilities. And overall he'll have the chaos emeralds with him. So he's pretty much power incarnate.

Subaru becomes envious of Reinhard because of a misguided view he'd made of the Sword Saint. Envious of not just his strength but what Subaru had assumed had been Diligence. Subaru vows to change his mindset to shed his slothfulness, to become the Hero. But brute forcing the first deathloop was never the right answer. And Subaru slowly loses sight of his original convictions.

Right before the royal selection ends, Subaru makes a difficult decision. This fic was inspired by A Little Too Late and Lone Star.

Why not?

After returning from Vollachia, Subaru is insecure if Emilia and him will be capable of keeping the nation together if she wins the throne to the royal selection. Especially after Vincent's particular remarks. So, he will start or attempt to start the Industrial revolution from his world to gain the upper hand in the royal selection and in the international arena.

Original story: Continuation of "Another Chance" on Archiveofourown. Not a DIRECT continuation of Re:Forgotten. "Subaru Natsuki has been summoned to a fantasy world! Everything seems so exciting and fantastical, and he even made lots of friends to boot! Though, something still feels off, as if they're hiding something..."