Chihiro runs a cram school at her home and earns 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 Chihiro lost her husband, so she reluctantly allows herself to do what he asks. - I didn't even know that Masahiko was witnessing the situation...