"Only mom can I ask this of... right? It's okay, isn't it? Please!" Shouted at by his girlfriend for being bad in bed, Kouji asks his mother, Yumiko, to be his practice partner. "Alright... but only once." Though she refuses several times, Yumiko gives in to Kouji's relentless pleas. "It's really no good... please stop!" Mid-act, she comes to her senses and resists, but his rough caresses gradually change her body, bringing her to climax multiple times...
