Chihiro runs a cram school at her home and makes a living by teaching several students, including her son Masahiko. After the exam is over, the students report their results with smiles on their faces. However, only Masahiko failed... Everyone celebrates the victory while Masahiko is depressed. When the group takes a breather, his student Honma asks Chihiro for a reward for passing the exam. It has been a long time since Chi lost her husband.