I still think this is one of the best scenes in Kakeguru
It starts with Rock, Paper, Scissors and somehow turns into one of the craziest gambling scenes in the anime.
For most people at the table it's about power. Winning means status, respect and staying on top. Losing can ruin your entire life at that school.
Then there's Yumeko.
She doesn't really care about the money or the status. She wants the game to become more dangerous. The higher the stakes get, the more alive she feels.
And when her poker face turns into that smile... you realize everyone else is trying to survive.
She's just having fun.