父さんアンタが憎い

Kosaku uses a computer to find out all he can about his cancer, so he can fight it. Meanwhile, former 3B students gather together in order to put into effect a suggestion made by Kinpachi years ago--to register at a bone marrow bank when they turned 20.

３年B組が卒業証書の原料になるケナフの刈り入れをしていた時、崇行（中尾明慶）がナイフで指を切ってしまう。崇行の血を見て震え保健室に運ばれた政則（東新良和）は…。