Kosaku becomes more emotionally unstable when he learns the truth about his illness. Losing his hair due to chemotherapy aggravates his emotional state. Kinpachi does his best to encourage his son, at times with strong words, at times with tender actions.

自分が悪性リンパ腫と知った幸作（佐野泰臣）は自暴自棄に。一方、３Bでは俊大（途中慎吾）や崇行（中尾明慶）がふざけて非常ベルを押し、驚いた哲郎（太田佑一）が…。