fuua kaede, a ordinary girl who loves beauty and fashion, was struggling with money to improve herself. she consulted with her university friend nao-chan, who works at night, and was recommended a book called 'old man conquest manual'. as she practiced what was written in the manual, she found it surprisingly easy to get money from old men. fuua, who got carried away, escalated her deception of old men. eventually, her regular old men found out about her deceit and gangbanged her for revenge.