Five girls in their 20s share a house called Belle Époque. A year has passed since “Hello, My Twenties 1.” Each of them got a job, went back to school, is still trying to get a boyfriend, or is getting over her first breakup. One day, a new student arrives at the house with a letter she stumbled upon. The letter is filled with curses on one of the girls at Belle Époque.

Age of Youth
Five girls in their twenties come to live together in a house called "Belle Epoque," which means "a beautiful time" in French. Each girl has a particular personality, background, and issues. In addition to the five girls, they believe there is a sixth presence - a ghost living in the house, but each sees the ghost differently. As the girls feel a bond of sympathy and become closer, they also deal with their personal issues as they live out their eventful twenties. The drama follows their struggles and incidents dealing with relationships - within their circles, with dating, and with each other - and a variety of events they are experiencing including credits, part-time jobs, drinking, hopes and dreams