Y/n is just you're average 14-year-old American. In his school's library, he finds a book about the 4 legendary heroes. He suddenly gets sent to a fantasy world as the fifth legendary hero.

During the early years of Ainz Ooal Gown, the guild managed to obtain the World-Level item known as ouroboros. Due to his dedication to the guild, the players decide to offer the special item to Momonga, the new guild master of Nazarick, as a gift in order to show their gratitude. However, the players soon realise their mistakes as Momonga, in a moment of panick, accidentally wishes for a unique NPC, Tashimī, who is his character's son. In response to his foolishness, the rest of the guild scold the undead for wasting the item on a useless NPC. Years later, YGGDRASIL is about to end, and Momonga decides to spend his last moments in Nazarick's throne room. However, as the clock strickes midnight, the overlord finds himself in a new world, and his son a powerful entity of unmatched might.

Demons: monstrous, immortal, supernatural, ancient and malevolent beings. Generally all demons inherently possess the murderous instinct to kill and devour humans. However, there is one particular demon who stands exceptionally unique from many others. He doesn't feed on humans nor does he possess the inherent murderous intent to kill, however you aggravate him at your own peril. Many members of the Demon Slayers Corps who encounter and subsequently anger him, are often left in a temporary comatose state. They find themselves mumbling a single word, "Marshadow". Disclaimer: I do not own Demon Slayer, or the pokemon Marshadow. Like my other stories, this is for fun and entertainment. Again, all rights to the original owners.

(Y/n) Musashi a young man who was sold off at birth didn't have the best childhood but was always kind to others and is one day saved by a demon slayer who takes him under her wing (P.s. you see that mother spider, yeah we making her legal in this)

Ben Tennyson finds himself in another reality met with the agency: MON, trying to save the world from Liminal crime and illegal DNA testing that threatens the stability of this joint society. [I don't own Ben 10 or Everyday with monster girls]