42-year-old slender mama K, who is weak to pressure, gets thoroughly fucked by a sadistic man. Her butt is slapped until it turns bright red, she apologizes while cumming from a vibrator, and with tears in her eyes from a face-fucking, she still craves the dick. This is a shocking documentary where the ultimate chemical reaction of sadist × masochist explodes, and a sexually frustrated masochistic body fully awakens.