Poker Face

Poker Face (ポーカーフェイス) is the 20th chapter of the 1st volume and the 20th chapter overall of the Spoof on Titan manga, written and illustrated by hounori.

Overview
After losing five times against Ymir at a game of Old Maid, Connie turns to Eren for help.

Summary
While playing a game of Old Maid, Connie is frustrated upon losing his fifth game and as promised, he is now expected to give his dinner to Ymir. He accuses Ymir of cheating, but Krista comes to her defense and enlists all the good deeds she had done in the past. Krista is quickly stopped by Ymir, who worries about her image being ruined. Sasha taunts Connie and despite Ymir's indication, she reveals to him that he has an evident smile on his face when someone is about to pick his joker.

Connie is upset and tells Eren about this, who offers to practice the game with him. Eren observes that what the others said was true and comes up with a solution for it. Connie, accompanied by Eren, again challenges Ymir but this time puts on a constant smile throughout the game, making it difficult for Ymir to pick. Unfortunately, Eren's smile gives away the joker's position, which leads to Connie losing five times again, costing him another dinner. Eren decides to avenge Connie but ends up losing himself.