What is the ending of the Korean love movie Wisdom Teeth?

At the end of the real film, when the heroine suffers from the pain caused by wisdom teeth, the reactions of three people have explained everything: 17-year-old boy, innocent, as if all this has nothing to do with him, not his fault, but because he is too young to know what treasure, love and true love are. It doesn't matter if the heroine's current boyfriend shows boredom. Li Xiu, her first boyfriend, showed her love, and her eyes were full of heartache. Another fortune teller said that her current man is not sincere to her, but the young one, which should mean that both young people are.

Hope to adopt