1 - 26PeriodMar. 28, 2007- 1 - 25No One Could Ever Take His PlaceMar. 21, 2007
- 1 - 24When You Die, I'll Die With YouMar. 14, 2007
- 1 - 23Boy Meets Battle GirlMar. 07, 2007
- 1 - 22A Decision Is RequiredFeb. 28, 2007
- 1 - 21Gone Into FlameFeb. 21, 2007
- 1 - 20With Strength And SpiritFeb. 14, 2007
- 1 - 19As Long As I Can Protect YouFeb. 07, 2007
- 1 - 18The EscapeJan. 31, 2007
- 1 - 17When Dawn ComesJan. 24, 2007
- 1 - 16New StrengthJan. 17, 2007
- 1 - 15An Intermediate ExistenceJan. 10, 2007
- 1 - 14Who Are You?Dec. 27, 2006
- 1 - 13Signs Of DeathDec. 27, 2006
- 1 - 12CarnivalDec. 20, 2006
- 1 - 11Till Death Do Us PartDec. 13, 2006
- 1 - 10It Seems We're Well MatchedDec. 06, 2006
- 1 - 9The Hayasaka TwinsNov. 29, 2006
- 1 - 8A Night in the DormNov. 22, 2006
- 1 - 7Whether or not You're a HypocriteNov. 15, 2006
- 1 - 6The Butterfly of Black DeathNov. 08, 2006
- 1 - 5To Protect SomeoneNov. 01, 2006
- 1 - 4Another New LifeOct. 25, 2006
- 1 - 3You've Become A Little StrongerOct. 18, 2006
- 1 - 2The True Form HomunculusOct. 11, 2006
- 1 - 1A New LifeOct. 04, 2006
The story begins when high school student Kazuki Muto is killed one night saving a mysterious girl from a monster, only to wake up in his school dorm, believing it to have been a dream; however, he soon finds out that dream wasn't a dream at all when a giant serpentine monster attacks him and his sister. Tokiko Tsumura, the girl he saved, explains that the monster is a homunculus. Kazuki had been attacked and killed by it when he was rescuing her; however, she, feeling responsible for him, revived him by placing a Kakugane medallion in his chest, serving as a replacement heart.
