Ji -wook, who continued to investigate to find the culprit of Sun -ah, hears about the S -line from the Hyunsuk, but increases. Meanwhile, living in Koshiwon and dreaming of an actor and dreaming of an actor, the staff, and Mi -sung finds S -line glasses in the aesthetic growth and feels it for liberation, but soon after seeing a woman connected to the music teacher who had been unrequited.

Ji -wook finds out the truth about Sun -ah's S -line through glasses. Meanwhile, Hyun -suk, ahead of his 18 -year -old birthday, makes a big decision and meets the Jun -sun, which leads to an unknown confusion.