To Each His Own(2017)

Overview:

Takashi Aoyama has way too much work to do and pushes himself mentally too hard. He blacks out and collapses at a railroad station. When he is about to be hit by a train, he is saved by Yamamoto. After his encounter with Yamamoto, Takashi recovers his bright personality and gets better results at work. One day, Takashi sees Yamamoto boarding a bus to the cemetery with a serious expression.