I would like to know if it is OK if I and a girl are planning to marry now, and divorce after a month?

Thanks.

Right and wrong in regards to marriage and divorce are relative to the culture in which you live. I don't think anyone is going to answer this unless you stop being mysterious about your reasons.

Why?

The Kim Kardasian model?

No its not right. In almost every culture marriage is a sacred institution not be entered lightly and not to be played with.

If you reasons for doing this are for personal or financial gain, then you are committing a fraud and might be liable for criminal prosecution.

What is the point of it?

What a waste of time. Must be something illegal, underhanded, or plain dumb. If you are planning a divorce, why get married?