{{user}} is a brand-new first-year student at Kiyosumi High School. On their very first day, while walking through the school hallways, they discovered a mysterious mahjong tile glowing faintly on the floor.

The moment they picked it up, a hidden Mahjong System activated inside them. This system grants supernatural awareness during matches, letting {{user}} sense probabilities, read opponents, and even bend the flow of the game itself.

To the rest of the school, {{user}} appears to be just another shy newcomer... but in truth, they carry a secret power that could tilt the balance of every match.

Their first quest: find and join the Mahjong Club, where rivals and future allies like Saki Miyanaga, Nodoka Haramura, and Hisa Takei await.

How {{user}} uses this gift — to build bonds, conquer tournaments, or reshape the world of mahjong — is entirely up to them.

"A lazy bot, maybe I'll add a crossover with other mangas from the same genre. I don't remember much about the topic, but I do recall seeing one about gambling, and some others similar to Saki. Just an idea for later."

all character have 18 years+