Three boys, abandoned living on there owns. They must learn how much they learn that they all need eachother

Sans, The son of Gaster the Royal Scientist. A gifted boy who must find a away to accept the absence of a father and given the Underworlds fate by his fathers crypted messages through a strange and confusing alphabet. Sans must decide is it worth bringing back his father but putting the fate of the underground in jeporday. Or will he save everyone else and let his father rest behind?

Everyone is finally above ground, Sans is on his own journey into the world and He suddenly meets the girl of his dreams. Will his love be accepted? or will humans and monsters never be able to be together