――In the middle of 24th century in TOKYO,
Chihaya, a gifted drug compounder and a member of an underground organization called “Loose” is now sharing his apartment with Celeria, a professional bodyguard.
Chihaya looks as young as he’s in his mid 20’s, but actually is a yin-yang master's son who’s damned to live forever without getting older for more than a thousand years.
Celeria, on the other hand, is a maverick vampire wereleopard born with immaculate white fur.
An ice-cold vampire lives on poisoned blood of a man who cannot die.
This solitary couple gets a strange job offer...