The relationship between Choi So-yoon and Kim Seo-won took a drastic change starting with ‘Nickname Date’ and caught the attention of viewers. The conversation they had in the car right after their date implied that their feelings had already gone beyond a simple tenant relationship. In particular, Kim Seo-won was embarrassed by Choi So-yoon's persistent and affectionate gaze, but did not avoid it and stared straight ahead, creating a strange tension. Choi So-yoon pointed out Kim Seo-won's change in attitude and recalled awkward memories from the past, and Kim Seo-won called herself a 'slow starter' and confessed that her feelings were ignited late. This flow of conversation clearly shows how deeply the two people are immersed in each other.

However, the speed of love is never one-sided, and the confusion experienced in the process brings both sadness and excitement to viewers. Kim Seo-won expressed her sincerity through ‘Self Talk’ by deeply empathizing with the psychological pain Choi So-yoon must have experienced when joining the group late, and admitting that he was the first person she thought of when she texted him every night. On the other hand, Choi So-yoon also honestly revealed his crush by confessing that his heart skipped a beat after discovering the unexpected masculine beauty of Kim Seo-won's everyday appearance as she was making ramen. These interactions suggest that the trust between two people extends beyond just external attraction to an inner bond. However, Kim Seo-won's past remarks that all unrequited love led to romance left Choi So-yoon with complicated feelings, amplifying the uncertainty of the future love line.

The romance of Signal House never flows linearly, but is constantly put to the test by external variables and new networks of relationships. In a recent broadcast, Kim Seo-won's bowling date with Gyu-ri Gyu and the sight of her providing close coaching and sharing affectionate skinship had a huge psychological impact on Choi So-yoon, who was watching. Although Choi So-yoon could not hide his disappointment, he did not stop his active offensive of affection, such as trying to give Kim Seo-won a high five every time she struck. Choi So-yoon's confident attitude is so active that even the panelists are surprised, and it clearly shows how fierce the emotional battle she is waging to win over Kim Seo-won.

Currently, ‘Heart Signal 5’ is heading toward an unpredictable ending with the residents’ emotions reaching their peak. With the program's viewer ratings somewhat stagnating, the production team is taking a strategy to rally viewers' interest again through the core narrative of Choi So-yoon and Kim Seo-won. In this season, which is scheduled for a total of 15 episodes, the confusion, jealousy, and courageous confessions they experience convey to viewers the essential difficulties and joys of dating at the same time. Attention is being paid to whether Kim Seo-won will be able to respond to Choi So-yoon's courage with certainty, or whether another twist awaits. Whether the emotional exhaustion in the name of love can lead two people to become a ‘real couple’ will be a key point to watch in the second half of the show.