On May 9 , 2011 , it was announced via Nao 's Twitter and Den 's blog that By-Sexual would reunite for one night . All proceeds were donated to the Japanese Red Cross for the victims of the 2011 Tōhoku earthquake and tsunami . By-Sexual 's first concert in sixteen years was held on September 3 at Shinagawa Stellar to an audience of 2,000 . Around the same time , Ryo and Den teamed up with their Zigzo bandmate Sakura to restart By-Sex . They released a mini-album titled '' Ago '' on August 17 and had their first show two days later at the 2011 Chain the Rock Festival
2011 Tōhoku earthquake and tsunami
2011 Tōhoku earthquake and tsunami
By-Sexual