Spiral was adapted into 25 episodes based on the manga,but some things weren't explained and in resulted in a diffrent ending.It was brodcasted by TV TOKYO beginning October 1,2005 to March 25,2005.It was later dubbed in English.Its opening was Kibouhou by Strawberry Jam and its ending was Kokutteru by Hysteric Blue.Link to watch episode 1

thumb|290px|right|Spiral Suiri no Kizuna Ending(Kokutteru)