Summary:

Ray has lived alone after his family died in a fire accident, including his younger twin brother. Being alone and fending for himself, he meets a set of twins named Domelle and Nero.
The trio become friends and life seems to be going smoothly; Ray becoming more and more humane and back into his life with every minute he spends. Just as he starts to heal from his personal tragedy, something happens...
Mysterious murders and a messenger from the "Boss" have given him notes and a rule...follow the note and nobody gets hurt.
Seeing how they know Ray's ever move, will Ray be able to stop this new turmoil with the help of his friends and prevent anymore innocent bledshed or will everything go down hill from there?