For many, marriage is the end goal – but sometimes, it's difficult to get there. This quest brings young people together under the same roof in search of love, with a catch: they must select their prospective partner solely on their responses to a questionnaire meant to assess their compatibility. Hosts Yoon Jong Shin, Lee Chung Ah, Choi Si Won, Park Ji Sun, and Mimi share their thoughts as the contestants meet each other in person for the first time in Italy, hoping to find their future spouse.

A group of romance-ready singletons arrives at Signal House ready to flirt! However, housemates must only express interest in one another via text message. The challenge? All texts are anonymous – meaning recipients must guess who is trying to make a love connection with them. A celebrity panel of love experts is on hand with commentary, including returning cast Yoon Jong Shin, Kim Ea Na, and Lee Sang Min, and a new group of pundits, including Oh! My Girl’s Mimi, Kang Seung Yoon of WINNER, and the psychiatrist Kim Chong Gi. This 2023 South Korean reality TV show is the fourth season of Heart Signal, which first began airing in 2017. It was produced by Park Cheol Hwan.