May debuts & comebacks! (via AK)

Wonder Girls – comeback single
- single 2 Different Tears scheduled to drop on May 16 (full album to drop in July)
- teaser photo & song title revealed on May 5

f(x) – comeback mini-album
- NU ABO album dropped on May 3
- Amber & Sulli’s teasers revealed on Apr 26
- Luna, Krystal & Victoria’s teasers revealed on Apr 27
- NU ABO MV teaser released on Apr 29
- mini-album tracklist revealed on Apr 30
- NU ABO track revealed on May 2
- promotional pictures released on May 6
- NU ABO MV released on May 5

Super Junior – comeback album
- fourth album Bonamana scheduled to drop on May 13
- comeback with ten members confirmed on May 3
- concept photo released on May 4
- MV teaser for Miinah released on May 6
- comeback stage scheduled for Music Bank on May 14

SS501 – comeback album
- album scheduled to drop later this month (comeback delayed)
- official concept photos released on May 1

Gummy – comeback mini-album
- mini-album Loveless dropped on Apr 21
- mysterious promotions begin on Apr 16
- Loveless album announced on Apr 19
- album jacket photos released on Apr 20
- There Is No Love MV & album released on Apr 21
- MV teaser for As a Man released on Apr 30
- more official photos released on May 3

MBLAQ – comeback single album
- second single album scheduled to drop on May 18
- teaser concept photo released on May 5
- two MV teasers released on May 6

Davichi – comeback mini-album
- mini-album Innocence dropped on May 5
- comeback with mini-album confirmed on Apr 30
- official album photos released on May 6
- MV teaser ft T-ara’s Eunjung released on May 3

E.via – comeback mini-album
- mini-album Must Have dropped on Apr 28
- MV teaser for Shake released on Apr 27
- music video for Shake released on May 4
- Shake MV receives criticism for eroticism on Apr 29
- age-appropriate version of Shake MV released on May 6

SISTAR – debut
- debut through Céci Magazine spread on Mar 18
- member Soyu revealed on Mar 22
- endorsement in Céci Magazine on Apr 13
- upcoming debut announced on Apr 24
- rapper Bora revealed on April 27
- first endorsement announced on Apr 22
- possible debut concept photo released on May 6

8Eight – comeback album
- track The End is Coming scheduled to drop on May 11
- album jacket photos released on Apr 14
- MV teaser (ft 2PM’s Nichkhun) revealed on Apr 26
- comeback date on May 11 announced on May 3

H2 – comeback/debut album
- album set to drop in early May
- H-Eugene announces new duo & comeback on Apr 22
- debut track Heartattack & MV released on May 6

Code V – comeback/debut single
- Addiction scheduled to drop on May 13
- return announced on May 6

CNBLUE – comeback
- track composed by Yonghwa to be released on May 10
- title track to be released on May 19
- comeback confirmed on May 5

IU – comeback single
- single album confirmed on May 6

Seo In Kook – comeback
- album Just Beginning scheduled to drop on May 6
- album teaser photos released on Apr 25
- Love U MV teaser released on Apr 28
- Love U MV ft Kim Min Jung released on May 5

Nine Muses – debut
- upcoming debut announced on Apr 3

Lotte Girls – debut
- debut announced on Apr 24

Beyond May/Unconfirmed:
- SHINee & Brown Eyed Girls
- Se7en to release mini-album in June
- Big Bang & 2NE1 scheduled to make comebacks with mini-albums this summer
- BoA scheduled to make comeback in August
- 2AM to release new album in September & hold Korean tour