Fua is an ordinary girl who loves beauty and fashion, but she wanted to improve herself and was worried about money. When she consulted her friend from university, Nao-chan, who works in the night industry, she was recommended something called a "Strategy Guide for Old Men." As she put into practice little by little what was written in the manual, she was able to collect money from the old men in an amusing way. Fua got carried away and began to escalate her deception of the old men. After a certain incident, the regular old men found out that she had been deceiving them, and she was gang-raped in revenge...