Suyeon and Donghee are friends.  Suyeon confesses her difficulties in dating and is getting along.  Meanwhile, Hyun-soo's daughter Hyun-jung and his boyfriend Jin-woo appear.  A coincidence triggers a situation where Jinwoo and Suyeon go to bed.  Jin-woo gets frustrated between his girlfriend and his girlfriend's mom.

Beautiful Mom

Project to change the lover’s lover  “Can you afford it?”  Underground and Sungmin are long-time couple living together. Unlike the subterranean basement, Sungmin is not able to exert his talent as a writer and gets stressed. Jee-geuk makes another boyfriend called Gyu-gyu who is underground, who is disappointed with his boyfriend.