Roller Coaster had a live concert entitled "Triangle," with the release of their 5th album at Textile center on May 5-6, 2006. The concert was very successful and delivered their various and fresh music to the fans. The audience enjoyed the groove of vintage and acoustic rhythms and a pleasant senstation of a perfect harmony of the band.

Jusuk Yun and Soyoun Lee of Techno Lite provided the lighting design and operation for the concert.