Senna, 24 (Kimura) is a college graduate who dreams of becoming a world class pianist. He teaches piano at a local piano school. Minami, 31 (Yamaguchi) is an out of work model. On her wedding day, she gets dumped by her fiance, and loses all of her savings, which she gave to her fiance. Her fiance turns out to be Senna's former roommate. She rushes to Senna's apartment and finds out that her fiance has skipped town. With no money, and no where to go she moves in with Senna.
Senna likes Ryoko (Matsu) who is a sophomore in college. He likes her a lot but just doesn't have the courage to ask her out. Koishikawa (Inamori) is Minami's best friend and is also a model. She provides much of the comedic relief in this show. Shinji (Takenouchi) is Minami's younger brother who just happens to be better than Senna at piano. He opens a bar/nite club. Rumiko (Ryo) plays Shinji's girlfriend. Sasaki (Morimoto) is Senna's professor at college and is always encouraging Senna to perform at the next piano competition. Long vacation is about Senna Hidetoshi (Kimura), a pianist who can't express his feelings, and Minami (Yamaguchi), a model who isn't really popular.