One day, DQN boy Horio and Iwashita, who got a job at a local cleaning company, happen to meet at a house they visited at the scene. "Huh? Maybe I was in charge of Group B. Is it Ryoko-sensei?" "Well! Both of us have become good!" A beautiful, middle-aged teacher who reunited for the first time in five years. A few days later, a beautiful "Alumni Association Information" postcard, created with crazy handwritten characters, is delivered to the beautiful female teacher Ryoko.