[All] Ahyeon's 'Monster', which shows her vocal skills growing further in 2 years

I was surprised when I first saw the 15-year-old male survival show because he sang the monster so well.

The Monster he sang on Begin Again when he was 17 after debuting was even more amazing.

I was surprised at how good her vocal skills were even at 15, but she's only grown more ㅠㅠ

At this rate, Ahyeon will probably only walk the path of a famous singer ㅠㅠ