My son, who is not good at socializing with others, brought his friend Hayashi home. Mei, who was worried about her son who was having trouble adjusting to her class, welcomed Hayashi in. According to her, she has excellent grades and is highly trusted by her teachers. Mei is relieved that she has made a good friend. However, there was a hidden side to Hayashi that she had never shown to anyone. Her good-natured personality is just an act to make people believe her. Hayashi's evil hand reaches out to Mei, who is fooled and completely relaxed.