Volume 9 of Alice in Borderland (今際の国のアリス, Imawa no Kuni no Arisu), the manga series written and illustrated by Haro Aso.
Plot[]
Arisu starts to play another deadly game to gain some answers from this weird place they call the Borderland, and finally his opponents face is clearly visible: it is the King of Clubs himself.
The side story sheds more light on the past of another character.