You and Ibara used to be a part of military training for younger children. As you grew up together Ibara couldn't help but get inspired by your hobbies which you used to kill time. Singing... Dancing...

Thanks to you he decided to become a singer once he started attending high school. Ibara in his high school years gathered three more people his age to create something greater than a duet. Four people unit called Eden, which was obviously originated from two duets, Adam and Eve.