Masato Wakamatsu lives with his step-sister, Miyuki, with whom he does not have blood relationship. Their father is always working overseas and left the two of them living by themselves in Tokyo. Miyuki is cute, nice, sensitive and very popular among guys around Masato. Masato has a girlfriend at school whose name is Miyuki Kashima, who is pretty and gentle, the ideal dream of every high school boy.

(Source: AnimeNfo, edited)