First single in 2015 from Arashi features "Sakura," which is the main theme song for TV series "Uroboros - Kono Ai Koso, Seigi" starring Toma Ikuta and Shun Oguri. This edition also features two B-side tracks (B & C) and karaoke tracks of all the included three songs. *Covers of all the two editions are different from each other.