Jeong-soo is full of bluff because of his father's hanky-panky business. His father suggests going to Japan to study and brings home a Japanese tutor named Akita Yuri. She's dressed revealingly and she's somewhat suspicious. Her lessons get more and more erotic day by day and Jeong-soo isn't able to get out of it. Then one day, Jeong-soo is shocked to find his girlfriend is pregnant. Meanwhile, he is even more worried because Yuri wants to know everything about what he does. What will happen to them?