A: I decided to be bound and determined...
단호해지기로 결심했어.

B: About what?
뭘? 뭐에?

A: I need to buckly down and get serious.
열심히 공부하고 진지해져야겠어.

B: How old are you? 22 or what? You are 37 years old woman.
너 몇 살이냐? 22살? 너 37살 여자야..