Episode 6 of "Bad-Memory Eraser" kicks off with Ju-yeon meticulously crafting her contract for the position of team doctor, her aspirations etched onto every line. However, a jolting revelation comes from Gun, who bluntly declares his disinterest in her. Yet, witnessing her vulnerable state, he relents, granting her the mercy of charging her phone and a reprieve until dawn.
As relief floods her being, a fleeting memory surfaces—Ju-yeon barging into Kim and Tae-oh's crucial meeting with a hospital board member, her determination shining brightly as she vowed to shadow the subject in their natural environment. The board member was left deeply impressed by her unwavering commitment.
The dawn breaks, and Gun is taken aback to find Ju-yeon still lingering in his office, baffled by her reluctance to leave. Their tranquility is shattered by Shi-on's urgent call, and to Gun's exasperation, Ju-yeon tags along. Amidst his annoyance, he proposes a wager—if Shi-on takes a liking to her, she'll secure the position as team doctor.
But chaos ensues as Mrs. Cha's fury boils over, enraged that Gun has failed to secure Shi-on's spot on the national team. Gun vows to rectify the situation, only to find CEO Hong has already preempted him. Adding insult to injury, he reveals that Gun's contract with Shi-on is null and void, lacking the guardian's consent.
Meanwhile, Ju-yeon finds herself utterly lost in Shi-on's world, her confusion palpable as she struggles to comprehend Shi-on's agitated chatter and the reasons behind her distress. Frustration getting the better of Shi-on, she mischievously lures Ju-yeon onto a rehab apparatus before darting away, leaving Ju-yeon bewildered.
Elsewhere, Sae-yan indulges in a wild night of partying, green with envy as Mrs. Kyung's concern for Ju-yeon becomes apparent. She yearns for the same maternal affection, only to be met with a broom-wielding Mrs. Kyung, scolding her for her reckless nights out and calling her oblivious parents, who were unaware of her whereabouts in South Korea.
During Shin's subsequent visit, Han unveils a tantalizing revelation: the restoration of even a fleeting memory fragment could serve as the catalyst, triggering a chain reaction that leads Gun to reclaim his entire past. This news sends Shin into a flurry of anxiety, which he attempts to deflect by inquiring about Ju-yeon's whereabouts. Upon discovering she's on a leave of absence, he impulsively heads to her neighborhood, only to stumble upon Sae-yan instead. Her father's inadvertent blocking of her card while purchasing beverages prompts Shin's reprimand, fueling her suspicion that he's stalking her. Their past interactions, consisting solely of three dates marred by excessive drinking, come to light amidst their bickering, ultimately culminating in a mutual agreement to sever all ties.
Meanwhile, Han presents Ju-yeon with Gun's latest diagnostic findings, highlighting a striking pattern: Gun's self-esteem plummets whenever she rejects him, and discussions surrounding his first love yield inconclusive results, shrouded in ambiguity. Han issues a solemn warning, urging her to safeguard Gun's well-being lest the neurosurgery department seize the opportunity to conduct unauthorized experiments on him, potentially jeopardizing his journey of recovery.
That evening, the Lee residence resonates with a chaotic yet heartwarming dinner ambiance. Their beloved pet, Cola, adds a touch of sweetness to the gathering, endearing herself to Gun who, in a secretive act of kindness, sneaks her extra treats and shares tricks. The family's hearts ache at the thought of Gun residing in his office, speculating about the possibility of a romantic interest in his life. Amidst laughter-filled banter about his first love and jests of being 'dumped,' Gun abruptly turns the conversation towards his accident. Shin repeats the rehearsed lie, asserting he was at home, but this time, Gun's intuition is sharpened. The GPS data from his vintage van, a silent witness, betrays the truth, revealing his journey to the reunion hotel. Furthermore, the missing memory card from the dashboard camera serves as a tangible reminder of a past he's yet to fully embrace.
The scene shifts to Shin, surreptitiously concealing a memory card within the confines of his safe, its hidden depths also guarding Gun's cherished medal. A poignant flashback unfolds, transporting us to that fateful evening by the river's edge, where Shin frantically performs CPR on an unresponsive Gun, his voice tinged with remorse as he apologizes. As the ambulance's sirens draw near, Shin's eyes fall upon the medal clutched in Gun's lax hand, prompting him to swiftly tuck it away.
Meanwhile, Ju-yeon chances upon Sae-yan, drowning her sorrows in alcohol. In a moment of vulnerability, Sae-yan confesses that Ju-yeon crafted the bracelet, a charm that, upon breaking, would supposedly grant her deepest wish. Yet, Ju-yeon's patience is wearing thin, her tone laced with exasperation as she urges Sae-yan to take action rather than rely on superstitions. Despite her earnest efforts, Ju-yeon's wish remains elusive, leaving her feeling isolated and consumed by jealousy towards Sae-yan, whose melancholic aura somehow captivates all.
As the night deepens, the two women drown their sorrows together, only to be interrupted by Sae-yan's bodyguard, who arrives to escort her home. But Sae-yan, fueled by a rebellious spirit, dismisses him with a fierce blow, the encounter serving as a stark reminder of a promise she made to her father. Together, Ju-yeon and Sae-yan stumble towards Gun's office, where exhaustion eventually overtakes them, and they slumber in the sanctuary of Gun's parking lot, their journey home momentarily forgotten.
At the hospital's hushed corridors, Dr. Han's heart sank as he realized no one had acknowledged the milestone of his birthday. Nurse Song's gentle offering of kimchi, accompanied by words of familial warmth, only accentuated his sense of solitude. Yet, a glimmer of hope ignited within him, mistaking her kindness for a sign of affection, and his spirits lifted momentarily.
Meanwhile, Sae-yan's sudden awakening sent her racing out, leaving Gun to confront Ju-yeon, who stood alone. His attempts to usher her away from the impending investor meeting were met with stubborn resolve. In a last-ditch effort, he surrendered his room key and extended their wager, binding them until the national team's competitive arena.
Ju-yeon emerged to find Sae-yan patiently awaiting her outside, their bond unbroken. With a mischievous smile, Sae-yan allowed Ju-yeon to enter first, only to witness the comedic chase that ensued as Mrs. Kyung brandished a broom in pursuit.
The investment meeting took an unexpected turn as the investor, a dramatics enthusiast, stipulated a condition: Gun must recruit Shin to secure the deal. Backstage, Hong was jolted by Sae-yan's father's revelation, photographs of his daughter entwined with Shin, a tacit warning from a gangster clan. Shin's candid confession of her background only confirmed the danger, though he had already distanced himself.
Sae-yan, selflessly, pressed a bracelet into Ju-yeon's palm, believing her friend's happiness to be paramount. Their bond transcended self-interest, a testament to their unwavering friendship.
Elsewhere, Tae-oh's mind raced with Kim's counsel, the key to undermining Ju-yeon lying in uncovering her vulnerability. Accompanied by Yeo, who marveled at Gun's newfound assertiveness, Tae-oh struggled to comprehend the transformation. Yeo offered insight, recalling his former state of perpetual anger and enmity towards Ju-yeon, a stark contrast to his present demeanor.
Elsewhere, our protagonists engage in their respective endeavors, with Ju-yeon delving into sports counseling, Gun immersing himself in research about the national team's competition, and Shin and Shi-on honing their skills through rigorous practice. In an unexpected encounter while searching for Shi-on, Ju-yeon stumbles upon Shin, who likens sports to the art of dating, urging her to experience it firsthand for comprehension. As she attempts various moves, her playful ponytail repeatedly brushes against his face, but his heart is so smitten that he barely notices the playful interruptions.
At the office, Gun's anticipation for Ju-yeon's arrival is disrupted by the unexpected presence of Guk-bong. Spying Ju-yeon's belongings, Guk-bong teases Gun about his first love, catching him off guard. Guk-bong's insistence on her departure stuns Gun, who promptly dismisses him and descends the stairs.
Later, Shin and Ju-yeon share a walk back, arranging a lunch date for the following day. Shin notices Sae-yan's bracelet on Ju-yeon's wrist, curiously wondering if it's the latest fashion trend. He playfully suggests a proper match between them, eliciting a cheeky response from Ju-yeon about a love game, which leaves Shin blushing furiously.
As they near the office, Ju-yeon's shoe becomes entangled in a grate, an incident that doesn't escape Gun's keen eye. He offers assistance, amused by her reluctance to accept help from others. However, his smile fades when he spots someone trailing her. Ju-yeon, too, senses the stranger and darts into the office building, prompting Gun to intervene and confront the mysterious figure—revealing it to be Tae-oh.
Tae-oh professes his desire to apologize for a misunderstanding, explaining that they had once planned a date upon Ju-yeon's return, only for his affections to shift towards Yeo. Gun wonders aloud why Tae-oh is confiding in him, and Tae-oh responds, as Gun's first love, he wishes to avoid any ill will. Taking advantage of the moment, Tae-oh also inquires if Gun is indeed certain that Ju-yeon is his first love.
Just then, Shin arrives at the office with beverages, startled to find Ju-yeon there. He wonders aloud if she holds the title of Gun's first love, and Gun's timely entrance confirms the truth. The sixth episode of "Bad-Memory Eraser" concludes on a revealing note, as one of the photographs sent by Sae-yan's father to Hong depicts Shin and Gun grappling on a bridge during the fateful night of Gun's accident, a haunting reminder of the past.
