Episode 7 of "Good Partner" kicks off with a dramatic turn as Sa-ra finds herself dismissed from her position. Venting her frustration to Woo-jin, she's met with a stark reminder: her actions, which demeaned the company's image and targeted its partners, violated its strict policies. A fleeting glimpse into the past reveals Woo-jin's pivotal role in persuading Eun-kyung to let Sa-ra go, her misconduct sealing her fate.
However, the tumultuous waters of the corporate world continue to churn for Yu-ri and Eun-kyung. A shocking arrival rocks the office as Yu-ri's father's mistress strides in, brandishing a promissory note for his house – a document that, unfortunately, holds no legal weight. With a sinister smile, she threatens to unravel Yu-ri's public stance against the company, threatening to tarnish her reputation and jeopardize her career.
Eun-kyung's subsequent visit to Yu-ri's mother uncovers a web of connections, revealing that Yu-ri's father was once her client during a contentious divorce. Amidst this revelation, Eun-kyung learns that Yu-ri's mother, heedless of her advice about the invalid deed, had already settled a hefty sum with the mistress. The mother's steadfast devotion to safeguarding her daughter's future resonates deeply with Eun-kyung, who finds herself in a similar predicament.
The following day, Eun-kyung's thoughtful gestures – a homemade breakfast for Jae-hee and a thoughtful snack delivery to his classmates – further endear her to the young boy's heart.
Meanwhile, Choi Sa-ra's world is unraveling. Her insecurities about her relationship with Ji-sang intensify, compounded by her job loss. Ignoring Ji-sang's concerns about his family's disapproval, she boldly confronts him at his new abode, igniting a fiery argument. Ji-sang's unwavering stance – that remarriage is not an option and Jae-hee remains his priority – leaves their relationship teetering on the brink of collapse, its tumultuousness akin to a wild rollercoaster ride.
Elsewhere, Yu-ri's father's second wife looms large, once again menacing Yu-ri's mother. Desperate, Yu-ri's mother turns to Eun-kyung, presenting evidence of her financial settlements and recorded conversations with the mistress. Though their exchange is fraught with tension, Eun-kyung's gentle inquiry about the mother's lingering anger towards her ex-husband elicits a heartfelt response: all she did, she did for Yu-ri, ensuring the child had a fatherly figure even amidst their parental strife.
As fate would have it, Yu-ri's mother insists she embark on a blind date, an encounter that unexpectedly intertwines with Eun-ho's filial gesture of treating his parents to a cozy coffee break. As Yu-ri departs, this tender scene stirs a profound realization within her—she has never reciprocated such an act of kindness for her own mother.
The evening unfolds with Jae-hee anxiously awaiting Eun-kyung's return, only to be pleasantly surprised by her early arrival. A newfound willingness to open up blossoms as Jae-hee encourages her mother to visit personally next time, a testament to the thawing of their once-frosty relationship.
The following day, the mistress, brazen as ever, confronts Eun-kyung about Yu-ri's lingering presence. But Eun-kyung, armed with incriminating evidence garnered from Yu-ri's mother, turns the tables, banishing the intruder from the company's premises in a triumphant display, further cementing her bond with Yu-ri. Yu-ri, overcome with guilt for misjudging Eun-kyung's intentions, apologizes sincerely, unaware that Eun-kyung had secretly played a pivotal role in her parents' divorce proceedings. Instead of resentment, Yu-ri expresses gratitude, recognizing the freedom her mother has found from the shadows of her father's past.
To celebrate this newfound liberation, Yu-ri pampers her mother with a luxurious dining experience, both women exhaling a sigh of relief as they finally cast off the burden of Yu-ri's father's legacy.
As the episode draws to a close, Eun-kyung's emotional dam bursts, tears streaming down her face as Ji-sang's reproach for her maternal absences echoes painfully. Meanwhile, Sa-ra's radiant smile illuminates the room, her joy at discovering her pregnancy a beacon of hope amidst the complexities of life's tumultuous tides.
