The Graduation of Edison(2019)

Original title: Lễ Trưởng Thành Của Ê-Đi-Xơn

Minh lives in a village where every child is born with a tree on their heads, except for him. On graduation day, students who have turned 18 will get their tree cut to signify adulthood. Problems arise when Minh’s sister decides to keep hers.