C1054 Finger-pointing
If this was the first time he had seen such a thing, it would mean that he would be furious. However, if he saw it ten times, he would only feel a little angry. But if he saw it for the 30th time, he would probably only have one more word to say.
"You don't know how to appreciate favors, right? If you don't know how to appreciate favors, then I'll show you today