In her family, Sofia is the youngest daughter and younger sister. Younger means stupid and naive. She really wants to become independent and adult. What do I need to do? Fall in love with your sister's chosen one, who constantly interferes in her affairs? Confess your feelings and go to a fashionable party? How to avoid falsehood, conventionality, insincerity? The book is addressed to teenagers who would like to understand themselves and learn to cope with life’s problems.* * *Sofia long ago realized that she needed to solve her problems on her own. The sister is always busy, the father sits with books or scientific treatises from morning to evening, and the mother is torn between work, hobbies and housework, so they have no time left for their younger sister and daughter... Is it possible to fall out of love and fall in love again in one evening? ? What is this: a sign of special intelligence or incredible stupidity? Sofia is in a hurry to become independent and adult. But how can one avoid falsehood, conventionality, and insincerity? She will have to find answers to her own questions.