The other two members of the F4 are Akira Mimasaka, the laid-back peacemaker of the group, and Sōjirō Nishikado, an unrepentant playboy. They both usually have at least one girlfriend at any one time; Akira prefers older women because the women of his household (his mother and two younger sisters) are quite silly. Sojiro is happy to be in casual relationships with many women, although we later discover that at one time he was in love with a childhood friend.
Over the course of the series, however, Tsukushi’s feelings evolve, and she begins to appreciate the degree of change that occurred in Tsukasa once he fell in love with her. He becomes fiercely loyal to Tsukushi and believes in her beyond all doubt, and slowly gets her to see him in a different light. The physical obstacles and emotional challenges of their rocky high-school courtship form the basis of the story. Other themes include Tsukushi’s attempt to fit in at the school, the problems of her family’s lifestyle and income, and the decadent lifestyle of upper-class Japanese girls.