Kenji (Masahiro Matsuoka) used to be the leader of a motorcycle gang, but became a girl's comic artist after losing his parents due to a sudden accident at 19. He risks his life to defend his younger sister, Yasuko (Mikako Tabe), and pokes his nose into everything about her. They are constantly fighting because Yasuko, a high school student, is totally fed up with Kenji who is an excessive interference like a father.

Erika (Ryoko Hirosue) used to be a leader of a women's motorcycle gangs and she, now manages a flower shop. Her super-good-looking younger brother Jun (Tadayoshi Okura) is a high school student. Erika still has feelings for Kenji as in the past, but when she meets him, she says hurtful words to him, which are opposite from her true feelings. On the other hand, Yasuko falls in love with good looking Jun at first sight.

What is in store in the future for Erika who cannot be honest about her straightforward but awkward feelings of love toward Kenji? How will Yasuko and Jun's first love result? This is a family comedy that shows heart-warming brother and sister relationships, and the strength of bonds between family, while following the love stories of two couples !