He doesn't hold a grudge.
 →   뒤끝은 없어.

[예문]
A:My brother gives off a scary first impression, doesn't he?
 우리형첫인상무서워보이지?

B:Yeah,He even yelled at me,so I was pretty frightened.
 응,나한테소리까지질려서 바짝쫄았지뭐야.

A:He does get mad sometimes, but he doesn't hold a grudge.
   어쩌다 화를 내긴하지만 뒤끝은 없어.

  Don't be too scared of him.
  너무 겁내지마.