Yukina : 陪练伙伴变成奴隶宠物 - 第1部分

Falling into the training hell that that married female mahjong player has fallen into.... Yukina, a married woman who has been feeling that her married life is not enough recently, steps onto a dangerous path after reading an advertisement for a position. She learns the pleasures of training and bondage. The pleasure of being a sex slave and the thick sperm being discharged raw into the back of her vagina. She can never go back to her peaceful life.