Dose Shinunara, Paris de Shino

Hiruma Yoshito, who is 31 years old and works as a part-time lecturer at a university, is forced by his pregnant sister to take care of his 10-year-old nephew Kota. But soon after, Kota disappears. Yoshito somehow manages to find and sympathize with him, who is despairing of reality and meaningfully says, "I want to go somewhere other than here." The two of them grow closer, and together, they pursue Yoshito's speciality, pessimism. The two live a strange life together, "pessimistic about life, yet somehow fun." Before long, the worst tragedy for each of them occurs. (Source: Japanese = nhk.jp || Translation = MyDramaList)