Oh Kyung-joo

Unlike Gi-hoon, who is happy running a noodle shop with his mother in their hometown, Ji-eun distances herself from her family due to her ambition to succeed as an idol singer. The siblings, who have been hurting each other more than showing love, find their conflict deepening with the news of their mother's Alzheimer's, whom they thought would stay young forever.

Ji-won, who had cut ties with everyone, takes a job at a factory that provides lodging and meals. She finds her roommate Ju-hee, a girl who dances the Tango all the time, both burdensome and intriguing. Ji-won gets involved in Hyun-woo's accident and feels uneasy as she watches Ju-hee try to take all the responsibility herself.