|Storyboard||Noriyoshi Sasaki; Kenji Konuta|
|Production||Noriyoshi Sasaki; Kenji Konuta|
|Opening||Feed the Fire|
|Japanese broadcast||Nov 30, 2017|
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Solidarity (Wedge/Binds) (楔束, Kessoku) is the ninth episode of the Ousama Game series that is originally written and illustrated by Nobuaki Kanazawa as a light novel. The episode premiered on Nov 30, 2017.
Teruaki threatens to assign -5 points to Natsuko unless gives back their phones. She gives back Nobuaki's phone but Teruaki assigns -4 points to Natsuko and -1 to her best friend Aimi. Then everyone else passes and Aimi is the last person to take a turn. She is reluctant to break her hand to save Natsuko and reveals Teruaki giving her a negative point was part of the plan to test whether Natsuko is a real friend by saving her. But Natsuko coerces Aimi to think about when she has helped her in the past, and she ends up breaking her fingers to save Natsuko and herself. Later, Nobuaki again convinces everyone to stick together and work as a team survive, but is again dismissed by Natsuko insisting their can only be one survivor like in her previous King's game. Then Teruaki gets a punishment, caused by Natsuko blocking the King's messages on Teruaki's phone to force him to break the rule to retaliate him.
- It is revealed that there are 10 survivors left.