Tsukushi has agreed to be Tsukasa's girlfriend! But there's a hitch--she'll go out with him for only two months to see if she can truly love him. Tsukasa is off to a bad start when he ends up smacking the womanizing new boyfriend of Tsukushi's friend Yuki at the end of a double date, making Tsukushi furious. Then Sojiro of the F4 helps Yuki by exacting a little revenge on her playboy boyfriend, and the two wind up on a date together. Tsukushi is worried to death about Sojiro taking advantage of her good friend. The question is…who is using whom?