I Help the Great Sage Raise His Child

A System that can take on caretaker assignments from all kinds of planes: Sun Wukong's ward, Sun Xiaosheng; the elf queen's ward, the elf princess; the Hellhound's ward, its pup; the Third Hokage's ward, Naruto Uzumaki; Itachi Uchiha's ward, Sasuke Uchiha; Grey Wolf's ward, Little Grey Grey; and even Ultraman, Spider-Man, and more...

If you can think of it, it can be looked after. Sun Feng, master of the Myriad Worlds Caretaking System, is just that insanely awesome.