His Red Silk - Soukoko story. (Bungo stray dogs)

Missing one night only to be accused of being dead, news quickly travels around the port Mafia and beyond the underground territory to alert everyone of the expected fate of their leader. Now, the Port Mafia is left in a vulnerable state with all the rumours circling about Yokohama.

Determined to find the Port Mafia's leader and restore things to how they were, Chuya is harassed by the Mafia leaders to act otherwise. Whilst they convince Chuya to take over the throne - he is focussed on only finding their boss. But when things start taking a turn for the words. Chuya real reason behind defending Mori comes to light.
Using this against him, The Port leaders decide to convince Chuya to recruit an old friend back into the mafia, feeling a desperate needs for his leadership. But Chuya knows he'll never go willingly. ...