The Ryuo's Work Is Never Done! Volume 5 by Shirow Shiratori

Yaichi travels to the island where summer never ends to face the Meijin, a living legend of the Shogi world who’s one victory away from his 100th title season—or one loss away from losing it all. With his own title of Ryuo on the line, Yaichi flounders when his opponent uses his own tactics against him. As one loss turns into three, he lashes out at the people there to support him until he’s forced to face the challenge ahead alone...

But those who believe in him won’t give in that easily! Even as the odds stack against them, Yaichi’s Shogi family fights to prove that hard work can break through the tallest of obstacles. In a match that plays with the forbidden, the Dragon King must break the rules he’s always played by to rise above the very game itself!