Her son, who is not good at socializing, brings his friend Hayashi home. Worried about her son, who had a hard time fitting in with his class, Mei welcomes Hayashi in with open arms. She learns that Hayashi has excellent grades and is well-trusted by his teachers. Mei is relieved to have made a good friend. However, Hayashi has a hidden side that he has never shown to anyone. His good nature is just an act to make people trust him. Mei is fooled and lets her guard down, and Hayashi's evil hand reaches out to her...