"Bye Bye Happy Days!"
Regular edition cover
Single by Kara
from the album Fantastic Girls
B-side
  • "My Boy"
  • "Beautiful Night"
ReleasedMarch 27, 2013 (2013-03-27)
GenrePop, dance-pop
Length4:36
LabelUniversal Sigma
Songwriter(s)Simon Isogai, Kim Won-hyun
Producer(s)Simon Isogai, Kim Won-hyun
Kara Japanese singles chronology
"Electric Boy"
(2012)
"Bye Bye Happy Days!"
(2013)
"Thank You Summer Love"
(2013)

"Bye Bye Happy Days!" (バイバイ ハッピーデイズ!, Baibai Happīdeizu!) is the eighth Japanese single by South Korean girl group Kara. It was released on March 27, 2013.

Editions

The single was released in four different editions. All limited editions come with a trading card randomly selected from five kinds.

Composition

The song was written and composed by Simon Isogai, who also composed "Winter Magic", "Ima, Okuritai 'Arigatō'" and "Orion", released by the group, with arrangements by ArmySlick.

The B-side "My Boy" is a Japanese version of the song "Date (My Boy)", released on the group's third Korean album Step. It was written and composed by Kim Won-hyun, and translated in Japanese by Kaori Moriwaka.

"Beautiful Night" is a bonus track of the first press regular edition. It is a Korean song written and composed by Kim Won-hyun. It was used as opening theme song for their anime KARA the Animation.

Music video

A teaser for the music video of "Bye Bye Happy Days!" was released on March 13, 2013 through Kara's official Japanese YouTube page. The full music video was released two days later on the TV channel Space Shower TV Plus.

Track listing

Limited editions[1][2] and CD only regular edition:[3]
No.TitleLyricsMusicLength
1."Bye Bye Happy Days!" (バイバイ ハッピーデイズ!; Baibai Happīdeizu!)Simon IsogaiSimon Isogai4:36
2."My Boy" (マイボーイ; Mai Bōi)Kim Won-hyun, Kaori MoriwakaKim Won-hyun3:24
3."Bye Bye Happy Days!" (Instrumental)  4:36
4."My Boy" (Instrumental)  3:25
Total length:16:01
Bonus Track (Limited Edition Version C):[3]
No.TitleLyricsMusicLength
5."Beautiful Night"Kim Won-hyunKim Won-hyun3:26
Total length:19:27
DVD (Limited Edition Type A):[1]
No.TitleLength
1."Bye Bye Happy Days!" (Music video) 
2."Bye Bye Happy Days!" (Music video - Dance Version) 
3."Bye Bye Happy Days!" (Music video - Making of) 
DVD (Limited Edition Type B):[2]
No.TitleLength
1."Orion" (Music video) 
2."Orion" (Music video - Close-up Version) 
3."Orion" (Music video - Making of) 

Chart performance

The physical single debuted at the position number three on Oricon's daily chart, selling 25,552 copies in its first day. On the next day, the single climbed to the position number two, selling 12,880 copies. On the third day, the single remained to the position number two, selling 9,265 copies. On the fourth and fifth days the single sold 7,729 and 6,217 copies respectively. With the total of 61,643 copies sold within the first 5 days, the single surpassed the first week sales of "Electric Boy", which sold 57,942 copies in its first week.

Oricon chart

Oricon Chart Peak Debut sales Sales total
Daily Singles Chart 2 25,552 78,325+
Weekly Singles Chart 2 65,588
Monthly Singles Chart 10 72,451
Yearly Singles Chart 90 78,325

Billboard charts

Chart Peak
position
Billboard Japan Hot 100 2
Billboard Japan Hot Singles Sales 2
Billboard Japan Hot Top Airplay 7
Billboard Japan Adult Contemporary Airplay 23

References

  1. ^ a b "KARA - バイバイ ハッピーデイズ!【初回盤A】 - UNIVERSAL MUSIC JAPAN" (in Japanese). Universal Music Group. 2013-03-27. Retrieved 2013-03-27.
  2. ^ a b "KARA -バイバイ ハッピーデイズ!【初回盤B】 - UNIVERSAL MUSIC JAPAN" (in Japanese). Universal Music Group. 2013-03-27. Retrieved 2013-03-27.
  3. ^ a b "KARA - バイバイ ハッピーデイズ!【初回盤C】 - UNIVERSAL MUSIC JAPAN" (in Japanese). Universal Music Group. 2013-03-27. Retrieved 2013-03-27.