Being the new girl at school is never easy, just ask Momo Adachi! When your 'best friend spends most of her time trying to show you up you just can't be too careful.

When you finally find your true love you should want everyone to know, right? But when your 'best friend has less than your best interests at heart, the rules are rewritten and anyone's the author.

Momo and Toji seem to have everything straightened out, but when Toji gets hospitalized, Momo finds out just how far Sae is willing to go to keep them apart.

With suddenly reformed playboy Kairi at her side, Momo attempts to set the record straight with Toji. But when her accusations are shattered by Sae's innocent act, she takes a desperate stand.

Now that Sae has gotten what she wanted, you think she would leave poor Momo alone. But after spreading even more vicious rumors, she volunteers her 'friend for the school swimming competition.

With the school swim meet close at hand, Momo suits up to do her part and help Class Three, but with a plan afoot to sabotage the races, it looks as if Momo's about to take the fall.