Yoshikawa, who works as a masseuse, has a so-called "sex friends" relationship with his customer Misuzu. Misuzu suffers from chronic "stiff shoulders," so the usual procedure is that after giving her a full body massage, Yoshikawa fills up her frustrated pussy with his cock. Misuzu's L-cup breasts change shape with each massage, and Misuzu's pussy sucks on his cock... Yoshikawa enjoys everything about her. And afterwards, Yoshikawa murmurs to Kokoro, "If I'm going to have a sex friend, I want a mature woman."