Russian Mahjong Khorosho!

The male protagonist Hiroyuki lost to an old witch in a mahjong game, as a punishment he was turned into a woman by the witch.

The witch told Hiroyuki if he wanted to turn back into a man, he must come to the witch's mansion and challenge the residents of the mansion.

To get back his male body, Hiroyuki started his mahjong journey to the mansion, until he discovered the true intention of the witch ...