It depends on the context. Sometimes getting wet could be part of a dramatic or comical scene and be okay, but in other cases, it might not fit the tone of the story.
Well, it's not a straightforward yes or no. It could be okay if it's part of a meaningful scene or serves a purpose in the story. But if it's random and doesn't add anything, it might not be so good.
It depends on the context and the specific manhwa. Some might have no issue with it, while others might consider it inappropriate or against the intended theme.
The main plot of 'a small difference' manhwa is about the lives of two characters who have very similar backgrounds but take different paths. The theme might be about choices and their consequences.