Munga-young and Choi Hyun-wook fell for each other again. Without knowing that they were each other's "dark history first love," a romantic atmosphere formed, bringing excitement to the home screen.

The viewership rating for the 4th episode of the tvN Monday-Tuesday drama "The Guy is a Black Dragon" (directed by Lee Soo-hyun, written by Kim Soo-yeon, produced by Studio N, planned by Studio Dragon), which aired on the 25th, recorded an average of 4.2% and a peak of 5.0% based on households in the metropolitan area, and an average of 4.0% and a peak of 4.7% nationwide, ranking first in the same time slot across all channels, including cable and general services. Additionally, the target viewership rating for tvN's demographic, ages 20-49, reached a peak of 1.9% nationwide, claiming the top spot among all channels in that time slot. (Based on paid platforms that include cable, IPTV, and satellite / Nielsen Korea provided)

On that day, the reason why Ban Joo-yeon (played by Choi Hyun-wook) had to work so hard to become the heir of Yongseong Group was revealed, evoking sympathy. As a child, Joo-yeon begged busy parents to take her to an animation event, and lost both parents in a traffic accident while on the way. Her only remaining family member, grandmother Jeong Hyo-seon (played by Ban Hyo-jung), blamed her grandson Joo-yeon. During this time, Joo-yeon saw Hyo-seon crying alone on the anniversary of her parents' death, felt guilty, and made it her life goal to become the person Hyo-seon wanted, burying her own pain and wounds. However, as this continued, Joo-yeon became more isolated and created a "secret room" as her only hiding place.

Ironically, the first person to step into Joo-yeon's secret room, which no one knew about, was Baek Su-jeong (played by Munga-young). Joo-yeon claimed it was her niece's room, but that wouldn't convince Su-jeong. To hide the truth, Su-jeong deliberately said to Joo-yeon, "You like comics, too, not just bands. You have way more things you like than I thought. You learned more about the Deputy Minister, didn’t you?" This once again made Joo-yeon’s heart race. At that moment, when Joo-yeon saw Su-jeong about to trip over a wire, she dropped her prized limited edition comic book and hugged Su-jeong, creating explosive excitement. Unknowingly, it became evident that Su-jeong was becoming more precious to Joo-yeon than her favorite collectible, raising expectations for their romance.

Meanwhile, Su-jeong and Joo-yeon shared their pains. Su-jeong received a call that her father, Baek Won-seop (played by Go Chang-seok), had been in an accident while on duty, and Joo-yeon accompanied her to the hospital out of concern. However, while trying to maintain her composure while looking after Won-seop, Su-jeong swallowed her tears alone outside the hospital room, a scene that Joo-yeon witnessed. Su-jeong revealed to Joo-yeon, "When I go to the hospital, it reminds me of my mother, who was sick and stayed in the hospital when I was a child," laying bare her wounds. The two grew closer by sharing their inner feelings that others did not know.

The sharing of secrets between them was not over yet. In a situation where Joo-yeon had to report to Hyo-seon, her tablet broke, prompting her to urgently retrieve materials from the office computer, but she couldn't bear to tell even her secretary her PC password. Joo-yeon quickly sent out an SOS to Su-jeong, sharing the password with hints of fandom titled "Ore wa Akumada" that elicited laughter. At that moment, the scene of Joo-yeon shouting "Ore wa Akumada" at full volume in the restroom, not understood by Su-jeong, had viewers in stitches.

Above all, Joo-yeon's undeniable feelings for Su-jeong were clearly revealed, catching attention. After opening up everything from the secret room to the computer password to Su-jeong, Joo-yeon readily accepted Su-jeong's goodwill as she secretly passed chocolate milk in the meeting room, opening her heart. In particular, Joo-yeon commented, "I was annoyed that my secret was discovered, but having someone know about it isn't so bad," sparking excitement. Conversely, due to Hyo-seon's directive ahead of a major renewal project, Joo-yeon, forced to deceive Su-jeong, later suggested that she would cheer up Su-jeong's mood by stating, "The only person who can give me chocolate milk now is Baek Su-jeong." However, unlike Joo-yeon, Su-jeong experienced chills at the thought of her first love, the black dragon, which she wanted to forget, raising interest in how they would react once they learn about their shared dark history.

Meanwhile, at the end of the broadcast, a crisis arose in the increasingly close relationship between Su-jeong and Joo-yeon, heightening tension. Su-jeong and Joo-yeon enjoyed a date at an amusement arcade under the pretext of conducting entertainment market research. During this time, Su-jeong received a call from Seo Ha-jin (played by Lim Se-mi), asking her to come eat at her pub, and they headed to "Sulho." Just as they were about to reach the pub, Su-jeong noticed her shoelaces were untied, and Joo-yeon knelt down to tie them, causing hearts to race. Moreover, at the moment their eyes met, a distinctly different pink spark began to fly between them, raising excitement, when Ha-jin's urgent call shouted, "Don't come! The black dragon is here," elevating curiosity for the next episode.

On another note, Ha-jin contacted Joo-yeon secretly to play a game, knowing that Joo-yeon had become an adult, and unlike initially being unsettled by Joo-yeon, remarked, "Just a weirdo? Kind of funny," indicating she had been attentively observing the changed attitude of Su-jeong. This raises interest in what role she will play in Su-jeong and Joo-yeon's romance.

Right after episode 4 of "The Guy is a Black Dragon," reactions on social media and various online communities included comments like, "Why is the third-generation chaebol male lead so funny?" "Su-jeong and Joo-yeon seem like a match made in heaven. Both are hilarious," "Joo-yeon's password being 'I am Akumada' is hilarious," "There really aren't any male leads like this in the world, which is so funny," "Su-jeong and Joo-yeon show a slow but sweet connection. I'm totally immersed," "Seeing Su-jeong and Joo-yeon softening is so delightful. I can't wait for next week," "Munga-young and Choi Hyun-wook's age-gap chemistry is unexpectedly perfect and even more enjoyable," "Choi Hyun-wook is getting cuter. I'm unknowingly being charmed," and "Munga-young's beauty has exploded. I wish I had a team leader like that."

tvN's Monday-Tuesday drama "The Guy is a Black Dragon" airs every Monday and Tuesday at 8:50 p.m.