One day, Kinpachi Sensei receives an urgent call for help from a former student. The young man's mother is on a drunken rampage. Kinpachi succeeds in straightening things out, but on his way home he is preoccupied with thoughts of his young son, who is a student at his school. Suddenly, he is attacked by a group of middle school students...!

Kinpachi Sensei's former 3B students come together again at the one-year anniversary of former principal Mr. Onishi's death. Rikiya is upset that some of his old classmates have stood them up. He rushes over to Mikako's home to demand an explanation. When a break-in occurs in the home next door to Mikako, Rikiya becomes a suspect.

Generations of 3B students band together to assist their ailing teacher with one last task before his retirement; helping delinquent student Kageura graduate and get into high school.