Money is the Key to Win a Girl's Heart

Kotori, a sixteen-year-old girl who is working hard to earn money, believes that nothing but money can make her happy. So, she is not interested in having a boyfriend but spends all her time working part-time. One day, however, her grandfather on the side of her father, who died three years ago, appeared before her. He is a very wealthy man and tells Kotori that if she could find a boy friend in Yashiro-gakuen School, he would leave his fortune to her!?