Ryuichiro Yamaki is back with the return of his solo project "R. Yamaki Produce Project: 2nd Season." Yamaki finally answers his fans by performing himself for the first time on highly anticipated new single, "i wonder feat. PEACE" which features up and coming young rapper, PEACE. Lyrics by Yamaki's long time collaborator and sworn friend, Yoko Hiji who also penned "Choosey Lover" by DBSK. "i wonder feat. PEACE" is about regrets of love and holding on to a man's pride with signature sexiness of Yamaki sound. i wonder is paired with "Rollin' this way feat. Aya" that opened R. Yamaki Produce Project Premium Live at Club Asia in 2009.