|Image from http://www.easyvectors.com/browse/human/travelling-vector-30|
Anyway, just the day before, the training ended and his brother had left for overseas work after the training.
So the problem was settled instantaneously. Even if I was too late informing him, it is good I establish some rules so that he is aware of it already.
Since the brother had left, I decided not to argue and be too harsh about the situation, and just thank my tenant for his kind understanding. Phew! Case closed too.