Kai flips a switch and becomes someone else entirely, a killing machine that solves problems the gentle version of him never could. That duality isn't a gimmick; it's the entire point, and the OVA burns through two episodes asking whether the real Kai is the one who cares or the one who destroys. By the end, you're not sure which half of him you were rooting for.
Kai and Haru are freshly recruited agents at Japan's Narcotic Control Department, thrust into a gritty world of crime syndicates and cutthroat criminals. On the surface, Kai appears gentle and caring, though he has troubles of his own. But in certain situations something switches inside him. His entire demeanor transforms into something lethal, a dark and violent alter ego at odds with his kind nature. As the pair take on dangerous cases involving drug trafficking and organized crime, the mystery of Kai's strange behavior deepens. Why does he change so completely? As they work, the truth about what lies behind these shifts and who Kai really is begins to come to light. This two-episode OVA blends hard-edged action with a central mystery.