She is Kim Taeyeon, it's nice, beautiful and a meaningful name , but in others' people eyes , she's just THE BAD GIRL

For the sake to protect her own younger brother , she's willing to sacrifice herself . For the one she loved, even he betrayed her , she chose to forgive him and believed him once again and again. For the one she trust, her friends, she's willing to go insane. 

Meanwhile, she will never ever thought, a single lie of youth , a crafty plot from a long time ago , can exterminate everyone's life. 

And her , Kim Taeyeon , how is she going to believe , how i she going to defend that complex youth of hers , say GOODBYE? 

Characters:

                                                                           ~Kim Taeyeon

                                                                           ~older sister to Kim Myungsoo

                                                                       ~ Kim Myungsoo

                                                                      ~ younger brother to Kim Taeyeon

                                                                           ~ Lee Minho   

                                                                         ~ classmates of Kim Taeyeon

                                                                           ~ex-boyfriend of Jessica Jung

                              Kwon Yuri                                                     Im Yoona                                                     Bang Minnah

                                                                     ~ best friend of Kim Taeyeon

           ~ Krystal Jung                                                                                  ~ Jessica Jung

                  ~ girlfriend to Kim Myungsoo                                                         ~ ex-girlfriend of Lee Minho