As introverted colleagues at a travel agency in Tokyo, Takuya Oohara and Rika Honjouji both cherish their happily single lives. After work, home is where they feel most at ease: Takuya unwinds with his cat, while Rika studies various maps. However, an uncertain future looms over their treasured tranquility when their company plans to open a branch office in Alaska within one year and transfer an unmarried employee there. During a day off, Takuya and Rika accidentally meet and, despite never having spoken before, open up to each other about their relocation fears. Feeling encouraged by Takuya facing the same predicament, Rika suddenly proposes a daring solution—to pretend to be engaged for 365 days. Takuya accepts, but little do the two know that the path to marriage may, in many ways, change forever the very lifestyles they struggle to preserve.

The second race in the MFG tournament at the notoriously difficult Lake Ashinoko track is underway. Though his car is severely disadvantaged in terms of horsepower, tune-ups to Kanata Katagiri's Toyota 86 GT allow him to quickly soar into a qualifying position. However, torrential downpour on the final day of racing brings tire traction woes and causes all drivers to struggle. Thanks to the environment he grew up in and his extensive training, Kanata surprises everyone when he is able to pull ahead of the pack—albeit with some very risky maneuvers. However, there are still two formidable competitors ahead of Kanata: last race's winner Michael Beckenbauer and Lake Ashinoko record holder Kouki Sawatari. But even if Kanata can close the gap, he still needs to watch out for the drivers in his rearview preying on even a single mistake that they can take advantage of.

A story about a handsome, but slightly troubled old man who pretends to be a fool to make the grandma's heart flutter. A tale of a couple celebrating their 50th wedding anniversary, still nurturing a new love. This is a story of a couple's daily life with nothing but happiness that you will want to watch forever.

Anime adaptation of the manga Kuroi Ame ni Utarete by Nakazawa Keiji.