As the twelfth chapter of "Bad Memory Eraser" unfolds, the narrative takes a
dramatic turn, bringing to light the complexities of love, memory, and the
blurred lines between reality and fabrication. The episode commences with a
dramatic rescue as Ju-yeon and Shin pull Gun from the pool, setting the stage
for a series of emotional revelations and confrontations.

Sae-yan's unexpected care for a feverish Gun adds a layer of tenderness to her otherwise clumsy demeanor. Her efforts to nurse him back to health are a testament to her growing affection, despite her initial awkwardness. Gun, in his delirium, is more concerned about Ju-yeon's absence than his own well-being, highlighting the depth of his feelings for her.
Ju-yeon's actions, however, are enigmatic. She sends Sae-yan to care for Gun while she herself retreats into domestic chores and deliberate isolation. Her discovery of Gun's diary, filled with heartfelt yet sorrowful entries, provides a window into his inner turmoil and longing for his first love. This revelation is juxtaposed with Shin's own struggles, as he grapples with his feelings for Ju-yeon and the guilt of his actions on the fateful night by the bridge.
The tension escalates as Shin's pursuit of Ju-yeon intensifies, leading to a heated confrontation. His confession of love is met with Ju-yeon's firm rejection, further complicating the already tangled web of emotions. Meanwhile, Gun's health and memory recovery become a catalyst for uncovering truths about his past, as he begins to piece together the events leading up to his accident.
Sae-yan's drunken attempt at making grappa results in a humorous yet endearing scene, where Gun finds himself taking care of her instead. This role reversal underscores the evolving dynamics between the characters, as lines between caregiver and patient, lover and friend, blur.
The episode reaches a climax as Gun challenges Shin to a tennis match, a sport that symbolizes their rivalry and the underlying tension between them. The match serves as a metaphor for their relationship, with Gun's questions about Shin's wristband hinting at his resurgence of memories from the night of the accident.
As the truth about Sae-yan's identity as Gun's first love comes to light, the characters are forced to confront their feelings and the reality of their relationships. The episode concludes with a series of dramatic events, including Gun's discovery of CCTV footage that could potentially change the course of their story.
"Bad Memory Eraser" continues to captivate audiences with its intricate plot and well-developed characters. Episode 12, "First Love Appears," is a pivotal chapter that delves deep into the themes of love, trust, and the power of memory, leaving viewers eager for the resolution of the unfolding drama.