Provided to YouTube by avex entertainmentRegret nothing ～Tighten Up～ · Hino Eiji (CV. Watanabe Shu)Regret nothing ～Tighten Up～℗ AVEX ENTERTAINMENT INC.Released on: 2010-12-01Composer: 鳴瀬シュウヘイLyricist: 藤林聖子Auto-generated by YouTube.