In episode 4 of Channel A's 'Heart Signal 5,' Kang Yoo-kyung and Park Woo-yeol are shown having an honest conversation on their first official date.

In this episode, the female residents choose the 'life book' selected by the male participants and go on dates with their matched partners. Kang Yoo-kyung waited for Park Woo-yeol at the meeting place holding the book she chose, and when Park Woo-yeol arrived, she smiled brightly, saying, "I'm so nervous, I don't know if I can eat." While talking at Park Woo-yeol's regular coffee shop, Kang Yoo-kyung suddenly said, "I want to drink," making a bold flirtatious move. When Park Woo-yeol asked, "Draft beer?" Kang Yoo-kyung replied, "Soju!"

Celebrity prediction panelist Roy Kim, watching the scene, said, "Yesterday, she was only drinking cider..." and Kim Eana responded, "I guess everyone acts like that when they like someone." Yoon Jong-shin commented, "That's a pretty strong line."

Later, the two continued their date at an izakaya, where Park Woo-yeol was seen removing a strand of hair from Kang Yoo-kyung's face. In a private interview, Kang Yoo-kyung revealed, "Park Woo-yeol took care of me so kindly that my feelings grew deeper." Near the end of the date, when Kang Yoo-kyung said, "It's a shame," Park Woo-yeol looked at her gently and asked, "You mean you're sad to go home?" The warm atmosphere continued between them even in the car on the way home.

Roy Kim said about Park Woo-yeol's natural flirting, "I think I'm jealous; that's a skill you can't learn." Kim Eana expressed, "I wanted to see this kind of scene, but on the other hand, I feel worried."

Kang Yoo-kyung and Park Woo-yeol had communicated via text on the first day of moving in, and through this date, their feelings appeared to deepen further. Episode 4 of Channel A's 'Heart Signal 5' will air on the 5th at 10 PM.