Hi,
A couple of men were walking toward the coed hot spring. Being naked in the spring, she was terrified. At first, she was embarrassed at the prospect of being seen naked by the strangers, but then she got up the nerve and ran over to where she'd left her yukata and quickly put it on.
Are there any mistakes? No, but try to avoid repetition. I'd suggest this.
A couple of men were walking toward the coed hot spring. She was in there naked, so she was terrified. At first, she was embarrassed at the prospect of being seen like that by the strangers, but then she got up the nerve and ran over to where she'd left her yukata and quickly put it on.
Best wishes, Clive