Roberta recruits a popular and handsome classmate, Diego Bustamante, to the band she's forming with Mía, Miguel, Lupita and Giovanni, but, in order to keep Diego's father León from finding out about the band, and to give Roberta an excuse to blow her mother off, they pretend they're dating. However, her strong personality and short fuses lead to a volatile relationship, with Roberta and Diego fighting a lot and hating each other. But, eventually, they fall deeply in love, although they both fight against their feelings and refuse to admit to it. They finally start dating for real, but eventually break up.