In the initial episode of Ashita no Yakusoku, we see a young boy wearing a black hoodie takes spray paint and rope from a hardware store. This scene is interlaced with the figure of a young woman who observes on-going classes at Tsubakigaoka High School.
Later, we learned that the young boy Keigo (Endo Kenshin) is a student of the school, while the keen observer is the new guidance counselor, Aizawa Hinata (Inoue Mao). Keigo is skipping classes and it becomes a subject of discussion during a meeting. The counselor suggests a home visit and together with Keigo’s teacher Mr. Kirishima (Oikawa Mitsuhiro), they met the boy and his mother, Makiko (Nakama Yukie).