2012-2013

In November 2012 the trio held a concert in Yokohama in which they announced they're going to release an original Japanese single titled "Promise You" on 23 January 2013. A teaser for the music video was shown during the concert and officially released through YouTube a few days later. "Promise You" on 23 January 2013 debuted at number two on the Oricon’s daily singles chart. In total, the single album sold 40,645 copies on its first day of sales on January 23. In the next day the single album ranked 1st place by selling 15,197 copies. In the first week of sales "Promise You" sold 69,067 copies, ranking 2nd place in Oricon Weekly Chart.