Ryuu earns his nickname the hard way. This man lives for mahjong, but not like other players who chase quick wins and easy money. He waits. He watches. He wins only when his opponent discards the exact tile he needs, a move called ron that separates the patient masters from the desperate gamblers. It's a philosophy that makes him nearly unstoppable against the yakuza and street hustlers who frequent the underground gaming dens where he operates. This OVA captures a single, intense moment in Ryuu's existence: a high-stakes game where his legendary restraint faces its ultimate test. The tiles click against the table. Tension builds with every draw and discard. Around him sit men with everything to lose and violence in their eyes, yet Ryuu remains eerily calm, waiting for the moment that belongs only to him. It's a study in quiet power and the psychology of gambling, where victory belongs not to the aggressive but to those who understand that winning means knowing when to strike.