The eighth episode of "My Dearest Nemesis" kicks off with Ju-yeon and Su-jeong immersed in a bubble of laughter and joy, their smiles reflecting a budding connection. Initially hesitant, Ju-yeon's nervousness melts away as she takes the initiative to intertwine their fingers. They wander in a playful circle, exchanging light-hearted banter, yet every time they verge on revealing their shared gaming history, fateful interruptions steer them away from the truth. Su-jeong, haunted by the fragility of their relationship, subtly distances herself, either concealing her feelings or gently pushing him away. As they eventually bid farewell, Ju-yeon playfully flashes a rock-and-roll hand gesture, which he reveals with a mischievous grin to mean "I love you" in sign language. Amused, she responds by sending him a selfie mirroring his gesture, leaving him elated and over the moon.
Elsewhere, Lee Hyeong-gun, the CEO of a prestigious investment firm, makes his approach towards Ha-jin, only to be met with a polite but firm declaration of non-romantic interest from her side, prompting her swift departure. Meanwhile, Shin-won unfollows Ha-jin on social media as he ventures towards a class reunion. Amidst the gathering, female classmates indulge in gossip about Ha-jin's ex, unaware of her presence until she strides in, confidently asserting her well-being. It transpires that they share the same alma mater, leading to an unexpected encounter on the rooftop, where they seek refuge from nosy friends inquisitive about their love lives.
Ha-jin confides in Shin-won about her past with her ex, how she thought she knew him intimately only for him to betray her trust moments into their marriage. Shin-won pledges his unwavering sincerity, reminding her of his silent support, often lurking in the shadows at Sulo. Boldly, she offers herself to him, yet he steadfastly refuses unless their intimacy is rooted in a proper dating relationship. Teasingly, she kisses him, challenging that they must embark on a romantic journey together.
On the weekend, Ju-yeon pays a visit to Su-jeong, only to have their rendezvous interrupted by Mr. Baek, who catches sight of them and cunningly summons Su-jeong inside, feigning the need to locate a crucial document. Matters escalate when Su-bin barges in, his gaze scorching and words scathing towards a bewildered Ju-yeon. After Ju-yeon's departure, Su-bin lambasts Su-jeong for her laxitude concerning her romantic endeavors, picturing Chairwoman Ban dramatically dousing her with water and showering her with cash, a scene straight out of a classic Korean melodrama. Su-jeong brushes off his antics but is moved when he confesses his genuine concern for her well-being.
While awaiting a meeting, Ju-yeon inquires about Kwon's motive behind aiding him. She feigns ignorance, instead steering the conversation towards highlighting Ju-yeon as the prime candidate to succeed Chairwoman Ban. Subtly, she issues a stern warning against future blunders.
Elsewhere, Shin-won inquiries Ha-jin's reversal on their dating status. She expresses a distaste for complications, emphasizing that their mutual affection and shared happiness suffice. He concurs, relieved to find them on the same wavelength.
It marks day one at work for Su-jeong and Ju-yeon as an official couple. Every time they narrowly escape detection, Su-jeong deflects suspicion by shouting down Ju-yeon. He pouts in response, prompting Su-jeong to attempt cheering him up. Moreover, Deputy Yang babbles incessantly about Su-jeong's blind date preferences, hinting at her fondness for older, mature partners. Ju-yeon, irritated, retaliates by saddling Yang with the task of shredding endless papers as punishment.
That evening, Su-jeong was taken aback to witness Ha-jin and Shin-won in a romantic setting. As their conversation unfolded, the elder pair inadvertently steered the topic towards Ju-yeon's preference for a gentle, affectionate partner—a stark contrast to Su-jeong's personality. This revelation rubbed her the wrong way.
Workplace harmony was far from guaranteed as two sales teams engaged in a bitter spat. Ju-yeon swiftly silenced them and then bestowed praise upon Su-jeong for a recent update. Once the others had departed, the female supervisor once again harassed Su-jeong, falsely accusing her of having a sexual relationship with Ju-yeon.
On their maiden date, Ju-yeon realized that he couldn't dress as he pleased. Su-jeong came to his rescue, producing matching couple's outfits that still adhered to the stringent chaebol dress code. He was melancholy about having to conceal their romance, but she didn't mind. However, her joy dimmed when he played a song they had shared during their gaming days. She voiced her discomfort, prompting him to express jealousy over her first love occupying her thoughts so deeply. She chuckled it off, and he encouraged her to reclaim the song as their own, reminding her that the past was just that—past.
Ju-yeon was beaming as he admired their soft-launch photos when Shin-won interrupted. He was thrilled that Ju-yeon had a girlfriend but his smile vanished upon realizing that the girlfriend in question was none other than Su-jeong.
Later, Su-jeong was grappling with a difficult client when Ju-yeon revealed that he had already taken care of the issue. Noticing her admiration, he teased her playfully. Kwon, catching a blushing Su-jeong exiting the office, was puzzled by the length of their one-on-one meeting.
Meanwhile, Shin-won confided in Ha-jin about Ju-yeon and Su-jeong's relationship. Ha-jin was astounded but Shin-won couldn't bring himself to break them up, seeing as they seemed genuinely happy. He harbored hope that their past would remain undisclosed.
One night, Ju-yeon devised a pretext to visit Su-jeong by asking her to locate a manga of his. Amused, she scoured through the myriad boxes they had stored in her attic.
The climax of My Dearest Nemesis Episode 8 saw him arrive at her place, only to find her looking distressed. She pulled out a necklace and inquired if he was indeed Black Dragon. It was the very same necklace he had worn when he first proposed to her, fifteen years ago.
