(Be aware, the ballbusting in this clip is particularly gentle and he only shows signs of pain at certain parts of the clip.)
She starts off by gently kneeing him in the balls and is very worried about hurting him but knees him very gently which doesn’t hurt him at all. She tries kicking once but says (in Japanese) that she prefers kneeing. She then has him lie on the bed and starts pushing her foot against his cock and balls. She tells him to tell her if it hurts. She stands up and holds his hands and briefly puts her weight on his groin before continuing crushing his groin as she sits down. She asks how he ejaculates by crushing himself and he briefly demonstrates. She then has him stand up and continues by squeezing his balls as she kneels in front of him. She realises that his cock goes inside his body and seems generally surprised as she pushes it in and out with her fist. She then stands up in front of him and continues squeezing. This continues as he lies down as she squeezes and pushes her hand down, crushing his groin. She hits his groin with her hand open and then punches gently before squeezing a bit harder. She begins using both hands and pushes down against his groin more. She then places her knee over his groin and leans over him for a while (sorry, the angle isn’t great here as it is hard to tell what she is doing).
After having him remove his underwear, she also removes her trousers and begins kneeing him in the balls. She knees harder than she did beforehand and hurts him on occasions. She then kneels down and begins squeezing his balls. She sees that his cock gets crushed into his body which surprises her and continues crushing his groin and is surprised that she can release it. She then continues using her hand to hold down his groin as he lies on the bed. After a while, she grabs his groin, leaving his balls showing and punches them with her other hand and pushes down on them. She then releases his cock and continues pushing down on his balls, allowing his cock to get harder. She then lies down and pushes her foot against his groin and then crushes his groin with her knee which hurts him a reasonable amount but she continues. After a final quick push of his groin with her hands, she has him ejaculate as he crushes his cock and balls over her knee as she holds him in place. He finishes rather quickly as she giggles and sees that he does so in his own body and releases it with a tissue to her surprise.
This clip was filmed in 2023. (55m 21s)