Itsuki has built his NEST. What did it cost him? With the threat of Shinonome eliminated, Rave is generating enormous profit, and NEST's operators have become infamous throughout the underworld. The success means nothing. Right now, neither Itsuki nor his best friend Tatsuya Yorozuya cares about money or status. They care only about one thing: taking the life of Umon-kai leader Goro Teshigawara. Itsuki would throw his own life away without hesitation to make it happen. Watching his dangerous resolve with growing dread is Rin Akinashi, his childhood friend and business partner. And closing in from the shadows is Luca, an executive of a Mafia syndicate. The final curtain rises on this hustler's waltz — one last dance along the edge between justice and evil.