The narrative takes place at Shishidou, an institution for the wealthy and elite. Tom Shirasagi, a gambler, arrives as a mysterious transfer student from a public school rather than a prestigious private one, confronting this elitist atmosphere. He issues a challenge to any student, claiming he will bring the entire school to ruin through a series of gambling matches. No one knows why he came to that school or what his true motivations are. During any match, Tom displays his unique coolness and ability; he employs a wide range of psychological and physical tricks to ensure victory. In any game, you will constantly ask how he plans to win, why he is really doing certain things, and what is really going on. At the end of the matches, the tricks are revealed, and they all work in real life, even if performing them requires high skill or luck. The story centers on the various matches he undertakes and the interactions between characters, such as Mika Shishidou, the beautiful granddaughter of the school headmaster, who is highly intelligent but contemptuous and superb, or Abidani, the vampiric-looking dorm superintendent and main villain (for now) in the series, who has a sadistic personality and whose goal is to make Tom leave his school (or to get him killed). As the story unfolds, more and more about Tom's past is revealed, leading to an unpredictable turn of events.