Those virile older men deceived by Fua, a girl from the port district, were given a guide about older men by Fua. They continued to retaliate by thrusting their penises into her with piston-like movements, trying to make her understand that she wouldn't stop even after they ejaculated! (SONE-706)

Fu Ai, an ordinary girl who loves beauty and fashion, is worried about money because she wants to improve herself. She consults her college friend, Nai, who works night shifts, and is recommended a book called "The Old Man's Guide." Following the methods in the book step by step, she finds it very easy to get money from old men. Fu Ai becomes overconfident and begins to cheat old men on a large scale. However, a certain opportunity leads the regular old men to discover her fraudulent activities, resulting in her being gang-raped in retaliation.