After having defeated Xehanort and managed to have saved Kairi from her fate, Sora disappears into a dark abyss of Darkness. Just as it seems like it'll be an endless sleep for having abused the Power of Waking, an outsider manages to teleport the young keyblade wielder into a different world.

Moments of the cast of WHDAAA reacts to Undertale as Subaru's past. (Not a full reaction fic, just moments of what could the reaction fic look like)

Erron black the one that his bullets cut through metal. And bullshit found himself in another world and another ability that he couldn't be more happy to have.

Misaka 9983 dies and repeat again and again will she escape this fate of her's?

In the Royal Capital of Lugunica, under cover of darkness, someone is stalking those who claim to come from beyond great waterfall. They doesn't know why. But it's them he's after. And no one can help them. Except for one man. They came to fight. For the people who could save their future. One came to protect them. The other to kill them. Relentless. Unstoppable.

Subaru gets teleported away from Lugnica

Three months after his unwilling return to Earth, Natsuki Subaru spontaneously combusts. A number of deaths later, he joins the Chaldea Security Organization. And then dies some more. Save the world, Subaru. If you can manage that, then maybe, just maybe, you'll find a way back to that other world of yours. Current Arc: Four Day Deluge - Okeanos

Hikigaya Hachiman finds himself transported into the Kingdom of Lugunica. Whether he'll find a way to get back is not the question - whether he'll want to go back, is.

Subaru never came to Lugunica. Instead, the ones transported to another world were Emilia, Rem, Beatrice and Puck. Shortly after arrival, they find themselves learning the story of the Boy Who Lived, and discovering he lives right next door to their gracious host. Upon realizing he is harshly treated, Emilia and Rem take it upon themselves to raise him. Co-writer: francoslama2005

Instead of the miracle-bringing Traveller in Aether/Lumine, Teyvat got another outlander. One who was far more useless, albeit influential nonetheless. Natsuki Subaru wakes up in another world and ventures forth to remember the past he had forgotten as well as to find a familiar face from Lugunica. (Spoilers up till Re:Zero Arc 6 and Genshin Impact Theories)

Durante la fiesta de el té de Echidna Natsuki Subaru se encontraba en su momento más oscuro, a punto de morir después de intentar suicidarse recibe la ayuda de un ser inesperado.

Oga se embarga en una inusual aventura en busca de leche materna para, Baby Beel. Transportados a otro mundo por culpa de Carmilla, quién, conmovida por la relación de Subaru y Satella, intento recuperar la conexión verdadera que ella siempre quiso, atrapando su propia alma dentro de Oga.

The Multiverse has many possibilities. The Control Devil was reborn in the body of a person who became a Neet because of others wanting him to be like his father, but now that Subaru Natsuki has incredible power. He realizes he could be greater than his father by creating a better world than the one he lived in but now he shall rebuild the world of Lugunica in his image.

Garfiel Tinsel finds himself in a new world by unknown means, leading to him meeting the legendary Shield Hero, Naofumi. What does this meeting mean, and will they be able to help each other?

When Yuji enters an incomplete domain, he is cast off to a completely different world. Not knowing what to do in this situation, he agrees to hand control over to Sukuna for a short time. He might come to regret that later. TLDR: Sukuna has a great time in the world of Re:Zero.

Eren Jaeger, following the end of the Battle of Heaven and Earth, had expected to be sentenced to an eternity in hell. What he never could have expected was to be cast into another world, devoid of Eldian and Marleyean influence. Unable to bear the weight of his sins, he chooses to walk a path of atonement in hopes of being able to rest before the last four years of his life end.

Makoto Naegi was on his way to Hope's Peak but something got wrong and he ended in this brand new world and what's more, everytime he dies he comes back to the past! Watch this amazing work and see how our lovely Luckster gains trust of so many. Makoto Naegi x Harem

what if subaru was send to the world of teyat instead of lagunica . how will the story change , how will teyat affect Subaru as a character and most importantly will he be able to find his purpose in this world or not.

Jon Snow was killed and through the mistake of Melisandre, his body ends up unable to return back, but the Three-eyed Raven gives him a new chance to live. And so, he shows up, armed with only Longclaw and Ghost at his side, in the Kingdom of Lugnica at the same moment as Subaru Natsuki. How would he manage to survive that hellhole of a world? Rated M for canon-typical violence.

Satisfied at the end of the events of FIRE, Prideif Subaru finds himself in Teyvat rather than dying permanently. Maybe he can find a way to find fulfillment on this Earth or to return. And maybe... there is a very small chance... he can figure out how to kill Reinhard... I don't think so. (There may be errors in spelling rules and grammar. There will definitely be...)

Ren Fujimura, A young man, is sent to alternate worlds in hopes of getting stronger. In doing so, he becomes a gambling addict.(Not out of choice) Well, at least he leveled up his luck, so he might just come out of this with his life. If the women around him don't kill him first. (Everyone has to have one bad story, so here's mine)

The Fourth Great Shinobi War was over and Madara Uchiha was the loser. After his last talk with his rival, his friend, and the man he hated most; Hashirama Senju he closed his tired eyes forever, but as fate would have it; a black hand dragged him from death's door and brought him to a completely new world.

Kazuma Satou and Subaru Natsuki meet their end on their earth life along with girls Aqua and Emilia. Trying to make the best of their new life they end up partying together all having the common experience of life in Tokyo. (Characters and other things from series not connected to ReZero and Konosuba will appear.) [On temporary hiatus till school stops bombarding me with homework]

En un dia como cualquier otro mientras estaba en clases, Izuku es apdusido por unas manos de sombras, terminando por ser teletransportado al mundo de Re: Zero. Lugar donde conocera y hara buenas migas con una linda mucama peliazul, mientras espera a poder volver a su hogar.

A young man is being ripped out of his universe just like how Natsuki Subaru was supposed to, but in it's way through the void Satella's magic lost grasp of him, the void started consuming him but before he was kill, something changed.