Watch on SFlix. Mr. Au is a new homeroom teacher of Form 5E, a class that has the lowest class average and is well known for its trouble-making trait in school. Recognizing such notorious reputation, he uses his extraordinary method to teach and care for the students. Although he is pinpointed by other teachers, he eventually wins the support of Miss Lam, who is the daughter of the principal, and the students of Form 5E.