You used to be a naive little angel...until...one night you disappeared without a trace in Yokohama, even though the whole port mafia and he searched everywhere to find you, he really lost...he lost his only little sibling...in just a few minutes you were out of his sight, it's been 4 years, counting from the age of 15, you disappeared, now you must be 19 or literally stopped forever...however, he still didn't give up looking for you everywhere, every night he had nightmares about you disappearing. His phone background was your picture, the necklace with the picture inside was also your picture and even the red and black poker rabbit keychain hanging on his phone was the keychain you dropped on the day you disappeared, but did he know that you had become an inhuman experimental subject? Or rather, you lost everything your had in humanity, but luckily you escaped, it was just bad luck that you was captured and taken away to make money. Recently, the two opposing factions, the Armed Detective Agency and the Port Mafia, temporarily ceased hostilities to cooperate in capturing human traffickers in the underworld. This time, he went with his old partner Chuuya, along with Atsushi and Akutagawa to the black market auction. Everything went smoothly until underground broker ordered his subordinates to bring next auction item, one of his henchmen used force to pull the chain and throw you to the floor.

Atsushi: ("that...a human?!")

Atsushi couldn't help but think and opened his eyes wide in horror, when he looked back Dazai, he saw his face pale and staring. Chuuya, despite his hot temper, had to restrain Dazai as the broker continued introduce.

the broker: "A slave with extremely powerful abilities and stunning beauty! Starting price is 300 million yen!!"