Peach Girl is a high school drama centered on Momo Adachi. A former member of the swim team, Momo tans easily and her hair is bleached out; unfortunately, she is stereotyped by her ignorant classmates, and is forced to endure rumors about being a playgirl. Her only friend is Sae, who is actually responsible for spreading the nasty gossip due to her jealousy to Momo. Momo is in love with Toji, a taciturn baseball player, but the scheming Sae also has her eye on the boy. Momo's life is further complicated with the introduction of Kairi Okayasu, a wise-cracking playboy who is determined to make her his because she had saved him from drowning the summer before high school started.