An assassin trained as a ninja carries the code name M. Hayami is a yakuza boss and a divorced father who is not allowed to come near his young daughter Mutsumi from his ex-wife Kazuko. In the big port city of Yokohama, M targets Hayami, who has angered the president of his group.

The lovely Ryoko is attending a Japanese University on an exchange program. She’s pretty, vulnerable, shy and full of mysterious secrets. Meeting up with her long-time friend Rumiko, Ryoko shuns her aggressive lesbian advances by saying she’s still a virgin. Rumiko is surprised at this revelation and, over the next few days, she takes Ryoko on a series of misadventures to help her with her sexual awakening...

On the eve of her wedding and while cheating with another man, a woman gets involved into a dangerous new world of experiences.