The manga focuses on the lives of two Japanese undercover narcotic police, Eto Kai and Kurabayashi Hal.

But the gentle and caring one of the group, Kai, has problems of his own: he can become a cold-blooded, killing machine under certain scenarios.

As the NCD works toward bringing down Ryuugen, however, answers began to arise, threatening to reveal the truth behind Kai's alter ego and exactly who the young criminal investigator is.

[36] Anime News Network's Carlo Santos praised Switch Volume 1 for "occasional wordless scenes help to create some strong emotional moments" but he criticized the manga for having "awkward plotting and confusing action scenes".

[37] Anime News Network's Casey Brienza criticized Switch Volume 2 for having "confusing, poorly considered artwork and mediocre story lines".