What does the lucky cat in flowers of war mean?

I think this is a sign of Japanese hypocrisy. They called the female students to their side ... as a transaction, and then gave the godfather a lucky cat, hoping that he would acquiesce in their practice and continue this kind of transaction in the future. It shows that they are unscrupulous. Another reason is that the lucky cat upstairs is from Japan, which is a representative and personal opinion. Don't pat the brick.