Chuuya Nakahara works in the Armed detective agency, sent undercover to the Port mafia. First, he is to retrieve Dazai Osamu, an executive in the Port mafia. This is to help the agency get Ranpo back. But... what were to happen if Chuuya and Dazai fall inlove amidst their hatred?

Chuuya Nakahara returns from an overseas venture to find that everyone has become obsessed with him. With the help of a perplexed Dazai (whose nullifying ability may be the reason why he's the only one not overcome with Chuuya-mania) can Nakahara get to the bottom of this mystery? Or will everyone love Chuuya....forever?