“Butterfly” can now be downloaded from various 音楽 sites, including iTunes, MelOn, Bugs, and Olleh Music.

[Original 記事 from 8/15/12]:

Girls’ Generation’s Jessica and Sunny, f(x)’s Luna and Krystal, and J-Min, all artists under SM Entertainment, will be participating in the OST for SBS’s new Wednesday and Thursday drama, “To The Beautiful You”, a drama based on Japanese マンガ series, “For あなた in Full Blossom”. The drama, which will begin airing on August 15th, is a high school romance about the chaotic survival of a girl named Goo Jaehee, played によって f(x)’s Sulli, who disguises as a man to meet high jump ゴールド medalist Kang Taejoon, played によって SHINee’s Minho, in a boys-only high school.

For the OST, Jessica and Krystal will sing a duet titled “Butterfly”, the 愛 theme song for the male and female protagonists. The song features a sweet melody with a blend of lyrics that shyly convey a childish and pure first love. As it is the first time the two siblings will officially showcase a duet, a hot response is expected.

“Butterfly” will be released on August 15th at noon on various 音楽 sites, including MelOn, Genie, and Bugs. The song will also be included in the first episode of “To The Beautiful You”, which airs on the same 日 of the OST release.

Girls’ Generation’s Sunny and f(x)’s Luna will also contribute to the OST for “To The Beautiful You” with a duet to be released at a later date.