In the 13th episode of Channel A's "Heart Signal 5," the affectionate atmosphere between Park Wooyeol and Kang Yookyung is capturing viewers' attention.

In the pre-released video, Park Wooyeol exuded a charm reminiscent of a "large breed dog," distinctly different from before, while beside Kang Yookyung. When Kang Yookyung returned after finishing her dinner date and naturally took a seat next to Park Wooyeol, the deep intimacy between the two was revealed without filter.

Kang Yookyung asked Park Wooyeol, whose face had turned red, whether he had been drinking, and Park Wooyeol in turn asked Kang Yookyung what had happened that day, continuing the conversation. In particular, Park Wooyeol displayed adorable jealousy and showed warm consideration by offering milk to Kang Yookyung, who was eating bread.

The moment they were left alone in the living room, a tense tension hung in the air as they faced each other. When Park Wooyeol asked again about her schedule, Kang Yookyung answered that she had visited an LP bar, and Park Wooyeol playfully complained that he was bored. He then stepped even closer to Kang Yookyung and whispered in her ear, maximizing the fluttering excitement.

On the "Celebrity Prediction Panel," Yoon Jongshin commented, "Wooyeol finally acts my age," and Roy Kim could not hide his surprise, saying, "Since when did Wooyeol become such a large breed dog?"

Afterwards, Park Wooyeol expressed concern about Kang Yookyung's unusual expression, and Kang Yookyung confided that she had been self-conscious. When Kang Yookyung asked if Park Wooyeol had known about this, Park Wooyeol showed an apologetic reaction.

Meanwhile, "Heart Signal 5" ranked first 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 took first place and Kang Yookyung took second. Episode 13 airs at 10 p.m. on the 7th.