Secret chosen to sing ending theme to "Naruto" spin-off, "Rock Lee's Springtime of Youth"

According to an update on Secret's Japanese official website on March 2nd, Secret has been chosen to sing the ending theme to an upcoming "Naruto" spin-off, "Rock Lee's Springtime of Youth." 

"Rock Lee's Springtime of Youth," which was originally released as a manga, is a comical spin-off the popular anime "Naruto," and mostly focuses on the Konoha ninja character, Rock Lee. His team members, Neji Hyuga and Tenten, and team leader Might Guy, will also be featured in the spin-off. 

Together, Team Guy will go on adventures and defeat their enemies. 

Secret will sing a new song identified as, "Twinkle Twinkle," and will begin broadcasting on April 3rd at 3PM local time on TX. 

Source: Secret-JPN