"Calling" / "Breathless" is the 40th single released by Japanese boy band Arashi.

"Calling" was used as the theme song for the drama Last Hope starring Arashi member Masaki Aiba.

"Breathless" was used as the theme song for the movie Platina Data starring Arashi member Kazunari Ninomiya.

The regular edition includes the two A-sides, two bonus tracks, and the karaoke version of all the songs.

[4] "Breathless" was composed by Takuya Harada, Christofer Erixon, and Joakim Björnberg, with lyrics by Hydrant.