Kekkon, Nochi Renai.: Reitetsu Onzoushi to Migawari Kekkon

Yukari, who works as a wedding planner, receives an urgent call from her boss one day and rushes to the scene. It turns out that the bride has disappeared just before the wedding reception that day! The groom, Fujishinji, is a handsome man with a cold demeanor, and he treats Yukari, who has been ordered to stand in for the bride, with extreme coldness... However, due to trouble that arises after the party, Yukari is forced to continue playing the bride's stand-in for six months!? Their fake married life seems fraught with difficulties, as they end up living together, but after getting to know Fujishinji, she realizes he's not as cold as she thought...?

(Source: Shusuisha, translated)