Mayonaka no Oyatsu

Fuji Azuma is overjoyed to spend two weeks with his eight-year-younger nephew Taira, doting on him and enjoying their time together. However, at the end of the visit, he is surprised when Taira and his mother announce they are moving overseas. Taira gives him a farewell kiss and promises not to return until he is taller than Azuma. Four years later, Taira returns to fulfill his vow.