Mr. Kinpachi in Class 3B S00 E09 Save the Children! Adults, Stand Up!

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...!