Criminal Border

Looked down upon by his childhood friend—a girl who thinks of him as a gloomy nerd—Itsuki Ninomae, whose hobby is making cliché MAD movies, one day happens to create a video that "arouses sexual excitement just by watching it" due to a series of coincidences. "What would happen if I showed this to her, the girl who looks down on me?" Driven by dark desires, Itsuki shows the video to his childhood friend, Rin Akinashi...! Itsuki's peaceful daily life ends on this day. "A massive business using the video." Pimping, yakuza, semi-outlaws—Itsuki is swept away and throws himself into the underworld, a place that should have had nothing to do with him.