Lucia believes that the time has come to lose their virginity, because she thinks that the boys do not want to know anything about the girls virgins. Carlos is her ideal man, but she think that should try another to not seem inexperienced.

Lucia is very concerned because they are more of the eleven and she remains in the club with her friends but comes Salva, a "charming" boy taught to play billiards and time stops.

Paula in nervous state because she has to submit her thesis on "cymex lectularius" or the so-called common bed bug for a doctorate in Biological Sciences.

Paula, impressed on the consumption of alcohol among adolescents, wants to find out if Lucia drink

Paula and Antonio planned an intimate dinner to celebrate their anniversary when Olga appears with the firm intention of "make more sweet" the evening. Meanwhile, Lucia dreams of being close to their favorite group, Blackstreet Boys, who announced his visit to the city to give a concert just for journalists from all over Spain.

Ángel's desire to spend a quiet weekend is truncated when Olga, his ex-wife, appears to entrust a publicity drawing and Lucía, his middle daughter, recalls him the closeness of her 15 birthday.