Sanada Tenshi, a former detective, is now the master of the tavern "Double" and has become something of a bodyguard in the city. Misaki Nagino, also known as Angelique Amano, is doing "kiss fortune telling" on the 4th floor of the building where his shop is located. Her catchphrase is "If you just sit quietly and kiss her, you'll understand everything." She calls herself an "Angel" and a man named "Angel". When the two meet, the shadow of Thanatos, the angel of death, creeps up on them...!