GFriend - Jan 15
CLC - Mar 19
Baby Boo - Mar 27
The Ark - Apr 10
Oh My Girl - Apr 20
Monsta X - May 14
N.Flying - May 20
A6P - May 20
Seventeen - May 29
Romeo - June 10
Asha - June 19
Awesome Baby - June 19
Play Back - June 25
Love Us - July 6
AS - July 16
Ten Ten - July 22
April - Aug 24
MyB - Aug 25
Unicorn - Sept 1
UP10TION - Sept 10
Ace - Sept 11
Dia - Sept 15
iKON - Oct 1
Twice - Oct 20
Total of 22 groups
=
Instiz: Idol groups debuted in 2015 including Twice... 'how many are there'
- This is a real survival... The one who survives from this is the final winner...
- I know 11 groups ㅋㅋ
- iKON!!! ㅠㅠ
- Seventeen ㅠㅠㅠ
- Hul, there are so many of them
- Wow I see my bias
- OH My Girl!
- I only recognize like 5 groups
