This couple is meant to be the kind that have been together for a long time and are comfortable with anything, and yes...I mean anything. They are funny with the way they nit-pick and stuff and I enjoyed watching them a lot.
They are the couple with a big age gap. Jin Nyeo acts like an Ajumma and Young Joon is a musician who is unemployed. Sara liked them a lot, I did too but to be honest I liked all the couples a lot.
This couple is obviously the gay one. They are funny too because Takuya is Japanese, he'll say something in Japanese that sounds like something inappropriate in Korean and Joon Jae will get all awkward and stuff, it's funny.
They are the fast-moving couple. They were very cute together in looks and are funny.