Ryo, a student who is preparing to get into a top school this year, is being taught by his brother's highly educated wife, Mei. He is alone with a girl he thought was out of reach. Her big breasts, which can be seen even through her clothes, her soft body, her delicious scent... All of these things stimulate Ryo's desires and he can't concentrate on his studies. Worried about him, Mei suggests that he lose his virginity... A dream graduation ceremony where he is taught step by step about sex by a beautiful woman with both intelligence and beauty, who he thought was never his match!