Before 30 (I'll be yours...)

"I'll promise I will be yours before I turn thirty"
Rosie made a promise to a high school friend that if she's still single before turning thirty, she will give herself to him. It was just a silly promise. But that was not the case for Jay.
Anong mangyayari kung mahal na niya si Jay kahit pa may kasintahan na ito? Will Rosie risk everything just to be with Jay? Mahal din ba siya ng kaibigan ng higit pa sa nararapat?

Will there be a fulfillment of their promise?