Kekkon Surutte, Hontou Desu ka?

Takuya and Rika, who work in the planning department of JTC, a travel agency in the Tokyo metropolitan area, are not very good at socializing, but they lived a fulfilling life alone. However, due to the opening of a branch in Anchorage, Alaska, singles will be dispatched overseas with priority, and Rika who is in trouble asks Takuya for a plan. The two, who have hardly spoken, will get married after only 365 days!
(Source: MangaUpdates)
~~ Adapted from the manga "Kekkon Surutte, Hontou Desu ka? - 365 Days to the Wedding" (結婚するって、本当ですか 365 Days To The Wedding) by Wakaki Tamiki (若木民喜).