She wasn't romantically involved with her husband's best friend—just a purely physical relationship. Ever since she started dating her husband, her connection with the friend remained strictly casual until he came to Tokyo. When he returned home, he threatened her, saying, "If you resist, I'll expose our affair," forcing her to endure it. One after another, his merciless cock invaded her body as he took pleasure in her reluctance, treating her like nothing more than a sex slave and cumdump.