JackHell



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  1. Public Bookmark 51

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    Summary

    A genius from the Dark Age of Technology gets teleported to 30k and fixes all sorts of shenanigans through the power of SCIENCE. Lots of techno gibberish. Not only science fiction but also fictional science. You have been warned.
    I don't know if this counts as AU but there are some canon-divergent background settings and timeline alterations. There is some romance but it's mostly not about romance.

    Language:
    English
    Words:
    102,541
    Chapters:
    41/?
    Comments:
    264
    Kudos:
    172
    Bookmarks:
    51
    Hits:
    8,297

    11 Apr 2026

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  2. Public Bookmark 67

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    Summary

    After 169 loops and restoring human order, Emiya Shirou is given a second chance in Orario's Dark Ages—a city under siege by Evilus. No Familia. No heroics. Just udon and anonymity. But Evilus hunts in the shadows, Astraea Familia marches toward their doomed fate, and a werewolf adviser won't stop asking why he refuses to update his status. Some swords refuse to stay sheathed.

    Language:
    English
    Words:
    17,295
    Chapters:
    2/?
    Collections:
    1
    Comments:
    10
    Kudos:
    89
    Bookmarks:
    67
    Hits:
    2,584
  3. Public Bookmark 94

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    Summary

    His entire being, a sword. His soul, a world of blades. His life, a rusted and broken thing, too painful to even look at. He fought for a shining ideal and found himself betrayed by it. In the name of guarding humanity’s progress, he was used as a tool of slaughter. And thus, his life had no meaning, for his heart had long since shattered like glass.

    But even if the scars remain, even if the wounds will never heal, even if his regrets will cling to him forever like persistent rust, perhaps he can still be given a way to relearn meaning again…just not in his own world.

    Language:
    English
    Words:
    38,221
    Chapters:
    12/?
    Comments:
    82
    Kudos:
    221
    Bookmarks:
    94
    Hits:
    9,072
  4. Public Bookmark 61

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    Summary

    Danny Fenton, Marinette Dupain-Cheng, and Peter Parker all had relatively normal childhoods.

    Well.

    Normal-ish.

    Sure, they each became superheroes in their early teens, but aside from the occasional villain, identity crisis, and near-death experience, things were pretty manageable.

    Then they each discover that the dads who raised them aren’t their biological fathers.

    Which would be upsetting enough.

    Except for the small detail that they’re half-siblings.

    And their shared biological father appears to be Bruce Wayne.

    Batman, meanwhile, has absolutely no idea he’s about to have three more problems.

    Or:
    Turns out Brucie Wayne really did have quite a playboy phase…

    (Slow updates)

    Language:
    English
    Words:
    6,398
    Chapters:
    2/?
    Comments:
    44
    Kudos:
    204
    Bookmarks:
    61
    Hits:
    2,642
  5. Public Bookmark *

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    Summary

    The weakest devil decides to use his magic to turn Rias and her peerage into his sex slaves.

    All characters over the age of 18.
    Mature content ahead.

    Language:
    English
    Words:
    24,611
    Chapters:
    5/5
    Comments:
    26
    Kudos:
    108
    Bookmarks:
    102
    Hits:
    21,143

    10 Feb 2026