Returning for its fifth season since its 2017 debut, Heart Signal welcomes a new group of singles to the Signal House, where the search for romance comes with a digital twist. In this social experiment, housemates can only reveal their feelings through anonymous text messages, leaving the recipients to guess which of their fellow residents is reaching out. Providing expert analysis on these clandestine connections is a celebrity panel featuring veterans Yoon Jong Shin, Kim Ea Na, and Lee Sang Min, joined by newcomers Roy Kim and Tsuki of the K-pop group Billlie.
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