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How can I fix him?
Can you help me?
Please.

Was the pose you used made for the P4 man? Or was it made for another figure?

It could be the pose was meant for a different figure and that is why it is causing problems with the pants.

Can you use another P4 figure? One that doesn't have any clothes on it from the start, and try that same pose and see if it works?

If the pose works on a nude P4 figure, then the problem is with the P4 Business Man. It might be the "Lo Res"  part causing the problem.

In that case is there a P4 Lo Res nude figure that you can use and put your own clothing on him?

I know you speak Korean, and I tried to translate all of that into Korean using Babel Fish, but I don't seem to have the language font because all that showed up were a bunch of question mark symbols.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi