"This is a tale that took place long ago. There once lived an old man and an old woman. The old man went into the woods to cut down some grass and the old woman went to the river to... (You know the rest.) The ogres had finally been defeated, but apparently, there were more ogres living elsewhere, so Peach Boy crossed the sea... It was an amazing feat to defeat the ogres and a joyous feat that Peach Boy saved many lives. But the one thing that went wrong... Was that they had fun. This is nothing more than a "What if"... What if there was more than one peach that tumbled down the river?

Newcomer Rei Izumi is joining the narcotics investigation unit of the Ministry of Health, Labour and Welfare. As a scout for the newly created STAND, she’s going to recruit the most unique of agents, investigators, and informants to make up a specialized team to safeguard the country. And their first mission is to discover the hazardous drug destroying the lives of innocent Tokyo citizens.