Kousai 0 Hi, Tsugaikon Kara Hajimemasu

Synopsis

"I look forward to working with you for a long time to come." The one who pledged eternal words is Hibiya, an Alpha lawyer, an acquaintance of Chihiro, an Omega. Not only have they not kissed, but they haven't even been in a relationship yet, and suddenly they are married! Can Chihiro be happy? (Source: Pixiv Comic, translated)