In the third installment of bestselling author Lisi Harrison’s middle grade series, Girl Stuff, seventh grade besties decide to have their first kisses on the same night.

It's that time of the year—Poplar Middle School’s annual two-week health and sex-education unit! And, well . . . it’s awkward.

Fonda thought she was on the same page as her classmates, but after hearing their anonymous questions about kissing it appears Fonda is not only behind on getting her period—she’s behind in everything!

Drew, on the other hand, wants her first kiss to be with her boyfriend. Just when the time seems right, something VERY unexpected happens . . .

Ruthie’s just had a misunderstanding of epic proportions with a boy friend (not boyfriend). Will boy stuff always be this complicated?

Fonda thought it would be perfect if they had their first kisses on the same night. But maybe moments like that can't be planned?

Through the fun stuff, the girl stuff, and all the awkward stuff, these three friends will be by each other's sides.