Grace no Rireki

In her beloved car, "Grace", a wife is on her way to Narita. Following a bus accident that kills her, her husband, Kikuo, gets access to her GPS which contains the history of all the places she travelled to without his knowledge. Suspecting infidelity, Kikuo embarks on a journey to trace the history of the cars GPS in order to solve the mystery.
(Source: Japanese = NHK || Translation = MDL)
~~ Adapted from the novel "Grace no Rireki" (グレースの履歴) by Minamoto Takashi (源孝志).