Answer: Culture shock
Step-by-step explanation:
Culture shock is a natural experience which people may have when they move to a new cultural environment different from the one they are used to(in terms of visiting or by migration ) causing them to be disorientated or confused but which stabilizes after integration into the new system. This feeling is mostly prevalent in cases where there is communication barrier and no support system to initially guide that person.
Danny's initial feeling of disorientation that he experienced when he traveled top South Korea is an example of Culture shock.