Episode 6 of "The Nice Guy" kicks off with Chang-soo's growing impatience as he awaits the fruits of his meticulously planned attack on Tae-hoon. Elsewhere, Tae-hoon finds solace at his sister's resting place in the columbarium, memories flooding back of their unbreakable bond before her untimely demise.
Meanwhile, Mi-young has embarked on a new journey, teaching piano to others, having finally conquered the shadows of her past trauma. Her melodic teachings resonate with a sense of renewal.
In a parallel scenario, Seok-kyung's longing for her son prompts Seok-cheol to orchestrate a heartwarming trip to an amusement park, accompanied by his friend Byeon-soo, whose affections for Seok-kyung are all too apparent. As the day unfolds in a whirlwind of joy, the bittersweet farewell between mother and son leaves a lingering sadness, with Seok-kyung's hollow promises of reunification hanging in the air.
Elsewhere, suspicion gnaws at Seok-hee as she believes Ki-hong to be straying. Her fears are ignited when she catches a glimpse of him with another woman at an art hall. Embarrassed and ejected for lacking a ticket, she reluctantly retreats. Post-show, Ki-hong confesses the truth to the woman—he is taken—and bids her farewell, while Seok-hee, on her end, declines the advances of a patient who had harbored romantic intentions towards her.
Simultaneously, Tae-hoon plays a dangerous game, deliberately targeting a bar under Chang-soo's territory to stir the pot. Seok-cheol steps in to diffuse the escalating tension and subsequently aids a fellow gang member who has agreed to eliminate Tae-hoon for Chang-soo, weaving a complex web of alliances and betrayals.In the interim, Mi-young is presented with an enticing proposition from an esteemed entertainment firm, inviting her to embark on a musical journey as a singer-songwriter. However, subtle clues scattered throughout the episode suggest Tae-hoon's covert role in facilitating this offer.
Concurrently, Seok-cheol is engulfed in a whirlwind of anxiety as he frantically strives to salvage his parents' beloved home. Ironically, his father, resigning himself to fate, prepares for the inevitable repossession by the bank and inks a lease for a modest apartment. Seok-cheol's refusal to eliminate Tae-hoon has left him financially crippled, unable to muster the funds needed to save their family dwelling.
On his way back home, fate intervenes as he crosses paths with the head of the local resistance, whose life he had once heroically saved. During their heartfelt conversation, the protest leader, with a tone of sincerity, urges Seok-cheol to abandon his life of crime and redirect his focus towards his family, reminding him that they are the cornerstone of existence for individuals like them.
Later that evening, as Seok-cheol ventures out to meet Mi-young, he stumbles upon an unwelcome sight – Tae-hoon, already in her presence. Tae-hoon, with a sinister glint in his eye, issues a chilling threat to Mi-young, promising to wreak havoc in Seok-cheol's life should she decline his advances. This ominous pledge hangs in the air as the episode draws to a close, leaving viewers on the edge of their seats.
