Danmachi: Legend of Zelda crossover Au (BOTW/TOTK)

One day a Nerd who played all the zelda's and watched most anime was killed by protecting a little girl from becoming roadkill by truck-kun thinking it was the end he sighed in relief as the life bled out from him.
what he didn't know is his act of heroism and the extent of his knowledge caught the attention of a goddess ready to descend on her world and her friend who had the ability to reincarnate a single mortal into their world with special abilities. making a pact they decided on him and who did her reincarnate as? none other then the goddess's chosen swordsman link but the world outside hyrule is completely different then he's used to but familiar to him from anime he watched.

-AU
-system (template + gatcha)
-harem
-kingdom building