Distance of Futures (From Mine to Yours)

There's nothing that Katsuki can't do once he sets his mind to it. The title of ruler, the allegiance of armies, and even gearing to end a generations-long war is an easy feat. But what can he do against a green-eyed man whose sense of duty is intangible, impenetrable, and impossible to break? / A story of someone who wants to close the distance, and another who must maintain it.