Patrick Frater Asia Bureau ChiefSecuring Endeavor Content to represent a second season of a cross-cultural fantasy rom-com four years after the show’s debut was good news for “Dramaworld” and its producer, Korean-American company Third Culture Content.So, too, was the attachment of major talent, including Daniel Dae Kim, Henry Lau, and feted Korean actor Ha Ji-won (“Secret Garden,” “Duelist”).But, arguably, the greater triumph was managing to produce the show this spring.