'Road to the Don' spinoff.

The Towada Family of the Yamaji-gumi—whose main headquarters is in Osaka—has risen to become the largest organization in Yokohama. At its core stands Tenkichi Mitsuyoshi, supported by the formidable Morisuka Brothers. The elder brother Kazuma (Show Aikawa) and the younger Misao (Kazuki Namioka) strengthened the combat-oriented Tenkichi-gumi, using their overwhelming force to seize control of Yokohama. But their dominance brings resentment within the ranks. When the second-generation boss collapses, the family fractures. A breakaway faction forms the Kinshishi-kai, expanding rapidly—and soon the brothers, the very "nucleus" of the Tenkichi-gumi, become their primary targets.

After the internal split, Kazuma Morisuka (Show Aikawa) charges alone into the Kinshishi-kai and dies in a blaze of glory. A year after his brother’s death, Misao (Kazuki Namioka) no longer appears at the Tenkichi-gumi headquarters. Meanwhile, the now-dominant Kinshishi-kai faces a string of attacks targeting only their executives. The power balance in Yokohama begins to shift— and just then, their sworn enemy Baba is released from prison. Baba rallies the Kinshishi-kai to crush the Towada Family once and for all. But at that moment, the long-hidden Misao finally makes his move.

"When Ikasama comes out, use your hammer to crush your hands," that is the rule of Ura Mahjong. Reika, a great female sparrow, beat many men and was scared as a crusher. However, as a substitute for Yakuza, Shimizu falls into a mean trap and Reika crushes her right hand. And a year later she came back. In order to save the women who are raped and sold their bodies by making a debt with Ura Mahjong. Before that, it was Shimizu, the nemesis of the relationship. And the last big game begins when the loser loses everything.

It is difficult to stand out at a Ginza club where every hostess wants to be number one. It is competitive. One of them is a virgin and also just eighteen years old. She wants to become the number one hostess to help pay the bills for her family. She advertises herself as 'virginity for sale.' It is an auction and the prize goes to the highest bidder. She doesn't have hostess skills however. The club's manager was the number one hostess in all of Ginza and helps the younger woman.

Amamiya, a blind sparrow. Reading his opponent's tiles with his invisible eyes, his terrific skill turned into a legend. It was Amemiya, which was far from the world of Ura Mahjong, but his daughter, Yume, was deceived by the Chinese Mafia and owed a large amount of debt to take on the behalf of the yakuza. The third series of "Ura Mahjong Mijin Retsuden" series presented by gambling x dense eros.

Misaki Miyasaka, a transfer student, who joined the Hanayama Gakuen "Undressing Mahjong Club". She has a special ability to see the character's role when she reaches sexual cum during Mahjong. One day, Misaki and his friends are going to challenge the undressing mahjong game against the yakuza to protect the peace of the school. The second series of "Ura Mahjong Mijin Retsuden" series presented by Gambling x Dense Eros.

Jin seduces the beautiful Aya. However, he later learns that she is the daughter of a powerful corporate chairman. Sensing trouble, Jin tries to send her away when she shows up again, but immediately afterward, she is abducted by an unknown gang.