In a pre-released video unveiled ahead of the 13th episode of Channel A's 'Heart Signal 5,' the changed atmosphere between Park Wooyeol and Kang Yookyung captures viewers' attention.

Park Wooyeol, who had a strong 'fox man' image up until the last broadcast, transformed in this video, showing a friendly and affectionate side in front of Kang Yookyung. After finishing a dinner date, Kang Yookyung returned to the 'Signal House' and naturally sat next to Park Wooyeol. Left alone together in the living room, the two gazed at each other and created an intimate atmosphere.

In particular, Park Wooyeol's tenderness and cute jealousy draw attention. He made sure to bring her milk when she was eating bread and playfully whined, 'Someone said they were bored on their date?' When Kang Yookyung asked why his face was turning red, Park Wooyeol expressed his jealousy in an adorable way, curious about how her day had been, and Kang Yookyung couldn't hide her smile at his super-close whispering.

When Kang Yookyung showed a different expression than usual, Park Wooyeol expressed concern, and Kang Yookyung replied, 'I think I'm just feeling cautious about the situation.' When Park Wooyeol responded with 'Did I do something wrong?' along with an apology and added playfulness, even the 'Celebrity Prediction Panel' couldn't hide their surprise. Yoon Jongshin said, 'Wooyeol is finally acting his age,' and Roy Kim was also amazed by Park Wooyeol's transformation.

Among viewers, enthusiastic reactions are pouring in, with comments such as 'Their visuals complement each other perfectly' and 'They look great together.'

Meanwhile, 'Heart Signal 5' ranked 1st in TV non-drama buzzworthiness on Good Data Corporation's 'FUNDex Chart' for the first week of July. In the cast member buzzworthiness category, Park Wooyeol and Kang Yookyung took 1st and 2nd place respectively, proving their unrivaled presence. Episode 13 airs on the 7th at 10 p.m.