Ruby Ring

Ru Na quietly visits the obstetrician on her own and ultimately decides to go through with an abortion. Meanwhile, Gyeong Min tells his family about his relationship with Ru Bi, and his father, Chairman Bae, heads to the company to see Ru Bi for himself, only to meet with an accident along the way.

When In Su suggests she quit her job and get married, Ru Na refuses to have the baby, prompting In Su to declare a breakup. Meanwhile, Chairman Bae meets Ru Bi and gives his blessing for the marriage.

Chairman Bae and Il Sun give their blessing for Gyeong Min and Ru Bi's marriage. Ru Na heads to the hospital for the abortion, but when the doctor advises against the procedure, she clings to In Su, desperately begging for his help.

Gyeong Min visits Gil Ja's place to ask for marriage approval. Watching from afar, Ru Na is overwhelmed with misery and mistreats Ru Bi. At Ru Bi's request, Ru Na goes to the company, where she accidentally meets Gyeong Min.

The day of Ru Bi and Gyeong Min's family meeting has arrived. Meanwhile, Cho Rim and Dong Pal chase the scammer who once stole her money in a taxi pursuit. And after the family meeting, Ru Na continues to lose her way.

On Ru Bi and Ru Na's birthday, the two sisters set off for Seoul together. Ru Na pushes Ru Bi to hand over her brand new outfit and forces her ruby ring off her finger. With Ru Na now dressed as Ru Bi and wearing her ring, the trip takes a frightening turn as Ru Na takes the wheel and sends them both into a dangerous drive.

After waking up from surgery, Ru Na is thrown into confusion when everyone around her begins calling her Ru Bi. As she tries to process what is happening, she learns that Ru Bi is in a coma. Seeing Gyeong Min sitting faithfully at Ru Bi's side, refusing to leave, something stirs inside Ru Na. A dark temptation begins to grow within her, one she finds difficult to push away.

In Su rushes to the hospital after hearing about the accident. He is shocked to learn that Ru Bi, not Ru Na, is pregnant. Meanwhile, Il Sun goes to Chuncheon to meet Gil Ja.

After her treatment, Ru Bi visits Gyeong Min's family, hoping to finally be accepted. But his grandmother still keeps her distance. As the engagement begins to shake, Il Sun urges Gil Ja to reconsider the marriage. Meanwhile, In Su notices the mole on Ru Na's foot and starts questioning the sisters' identities. Desperate to protect her new life, Ru Na begs him to keep her secret just once.

Gyeong Min visits Gil Ja's place to ask for marriage approval. Watching from afar, Ru Na is overwhelmed with misery and mistreats Ru Bi. At Ru Bi's request, Ru Na goes to the company, where she accidentally meets Gyeong Min.

It is the day of Ru Bi and Gyeong Min's family meeting. Meanwhile, Cho Rim and Dong Pal chase the scammer who once stole her money in a taxi pursuit. And Ru Na continues to lose her way.

Ru Na is deeply relieved to find out that Ru Bi has woken up with no memory of who she is. Seeing Ru Bi awake in Ru Na's face, In Su is consumed by the unbearable truth. Determined to stay in control, Ru Na works to convince Ru Bi that she is Ru Na, doing everything she can to make that identity stick.

Ru Na feels the weight of Ru Bi's memory loss, torn between guilt and the need to protect everything she has built. Her unease grows the next day when In Su shows up at Gyeong Min's home, threatening to disturb the fragile stability she has been holding onto. At the same time, Ru Bi begins psychological treatment.

On a trip to Chuncheon, Ru Bi runs into Yeon Ho and his friends. Mistaking her for Ru Na, Yeon Ho makes unwanted advances and Ru Bi narrowly avoids an uncomfortable situation. Ru Na is fully absorbed in her new life, enjoying every aspect of being a daughter-in-law in a wealthy family.

Ru Na is rattled when she is told to return to work, and her anxiety deepens after receiving a photo from In Su. Meanwhile, In Su is violently attacked by unknown assailants outside his home. At the office, Ru Na comes face to face with both In Su and Ru Bi at the same time.

Gyeong Suk gets deeply upset when Gyeong Min defends Ru Na. Gyeong Min himself is actually growing deeply disappointed in Ru Na because of her drinking and excessive shopping. Later on, Ru Bi and In Su arrive at the exact location where Gyeong Min and Ru Na are spending time together.

In Su and Se Ra are chased by a mysterious car. In Su gets angry when he finds out that Ru Na was behind it. Because of Ru Na's mistake, JM Group faces serious financial damage.

Gil Ja's family heads out on a picnic with Dong Pal and In Su. Back home, Ru Na is fuming after seeing a photo that In Su sent her. On the special cosmetics sales day, the scheduled host gets into an accident right before going on air. Ru Na steps in to take her place, going live in front of an audience for the very first time.

Riding high after successfully selling out the entire cosmetics line, Ru Na becomes a standout host at JM Home Shopping. Meanwhile, Gyeong Min invites his in-laws to an upscale restaurant for a family dinner. Just as the meal gets underway, In Su arrives at the restaurant with a gift box in hand, throwing the atmosphere into tension.

In Su threatens to reveal Ru Na’s secrets to Gyeong Min, while Ru Na struggles to protect her false identity as Jeong Ru Bi. Meanwhile, Geum Hui causes trouble with her plastic surgery plans, and a rehearsal accident raises new tensions around Gyeong Min.

Ru Bi injures her foot on set, and Gyeong Min helps bandage it, upsetting Ru Na. Meanwhile, In Su continues to threaten Ru Na by sending an ultrasound photo of a baby to Gyeong Min, which alarms her. After that, Ru Na goes straight to In Su’s place to make him an offer.

Ru Na sends Ru Bi on an errand to the company's logistics center. By chance, Gyeong Min happens to be visiting the same location when a security system malfunction traps them both inside together. When word gets out, Ru Na and In Su drop everything and rush over, each with their own reasons for wanting to get there fast.

In the middle of the night, Gyeong Min walks in on Ru Na frantically ripping pages out of her diary. Deeply unsettled by what he sees, he confronts her, and Ru Na brushes it off as stress. Amid the personal turbulence, a competing home shopping company reaches out to Ru Na with an enticing offer to come work for them.

Ru Na encourages Gil Ja to move quickly with In Su and Ru Bi's marriage plans, leaving Gil Ja deeply conflicted. When Gil Ja brings it up, Cho Rim mistakenly believes it is about her future with Dong Pal.

Although In Su refuses Yeon Ho's envelope of cash, he unexpectedly becomes the target of a bribery investigation. As pressure mounts and suspicion spreads, Ru Na accelerates In Su and Ru Bi's wedding plans in hopes of clearing his name.

In Su presents Ru Na with a video of her and uses it as leverage against her. He makes his terms clear: unless Ru Na takes steps to clear his name and remove the false charges against him, he will send the video directly to Chairman Bae and Gyeong Min. Ru Na is left with no easy way out.

Thanks to Yeon Ho's unexpected decision to come forward and turn himself in, In Su is finally cleared of the bribery charges. Later, Ru Na finds herself drinking alone when Gyeong Min unexpectedly crosses her path. Meanwhile, Ru Na takes a significant step forward in her career by signing the production contract for the Jeong Ru Bi Show.

In Su is viciously attacked and falls into a deep coma after surgery. As Ru Bi sinks into utter despair watching him fight for his life, Ru Na takes advantage of the chaos to quietly retrieve In Su's laptop and personal USB from Yeon Ho.

Ru Bi is moved to tears when In Su wakes up, and their relationship takes a new turn. Meanwhile, the first live broadcast of Jeong Ru Bi Show gets underway. As the show goes on air, In Su unexpectedly appears before Ru Na, leading to a dramatic turn of events.

In Su arrives at the decision to propose to Ru Bi, a choice that stirs something complicated in Ru Na. As In Su slides the ring onto Ru Bi's finger and proposes, a sudden flash of memory washes over Ru Bi. The image of the ruby ring surfaces from somewhere deep inside her, awakening something she has not been able to reach until now.

Ru Na intentionally knocks Ru Bi's ring away, making sure it gets lost. Later, Ru Bi arrives at In Su's place to wait for him after he is held up. While alone inside, she notices an unfamiliar box and finds herself drawn to it, unsure of what it might contain or what it could mean.

Gyeong Min becomes increasingly upset when Ru Na refuses to hand back Ru Bi's engagement ring. Meanwhile, Ru Bi is confronted with unsettling stories tied to her past and begins questioning what really happened before the accident.

Ru Na senses that Yeon Ho may have leaked sensitive information to Eun Ji, creating unease between them. At the same time, Chairman Bae reacts angrily after hearing that a documentary crew will be visiting because of Ru Na. While the growing conflict and pressure surround the family, Ru Bi carefully considers her future and reaches an important decision involving In Su.

Gyeong Min meets Ru Bi to give her ring back. When Ru Na spots the two of them together, she is overcome with anger. Meanwhile, Ru Bi is on her way to In Su's home to show him the wedding dress that Se Ra gifted her. At that time, she unexpectedly runs into Yeon Ho.

When Ru Bi wakes up, she leaves the hospital and goes to In Su's place, who doesn't know she has regained her memory. She is tormented by whether he knows she is Ru Bi or believes she is Ru Na, and she decides to take revenge on her sister who stole her life.

When Ru Bi wakes up, she leaves the hospital and goes to In Su's place, who doesn't know she has regained her memory. She is tormented by whether he knows she is Ru Bi or believes she is Ru Na, and she decides to take revenge on her sister who stole her life.

Ru Bi asks In Su to postpone their wedding, while her behavior begins to resemble Ru Na before the accident. Gyeong Min grows anxious when Ru Na finds Ru Bi's muffler at home, raising suspicion and tension. As family conflicts deepen, Ru Na struggles with feelings of rejection and jealousy, believing Ru Bi has always taken love and happiness away from her.

Ru Na starts wondering whether Ru Bi's memories may have returned after seeing her unusual behavior. Meanwhile, Ru Bi discovers a notice for JM Group's in-house competition, leading her to consider a new opportunity.

In Su grows suspicious that Ru Bi's memories may have returned, while Ru Bi decides to participate in JM Group's proposal competition. As tensions rise, Ru Na steals Ru Bi's laptop to interrupt her chance to enter the contest.

Cho Rim is upset by how rudely Dong Pal treats Gong Nam, while Il Sun lends Geum Hui some money. After a heated argument with Ru Na, Gyeong Min calls In Su to come meet him. By the end of the night, In Su finds himself carrying a drunken Gyeong Min all the way home.

Cho Rim and Dong Pal share a moment that reaffirms their feelings for each other. Things take a darker turn for Ru Na and Gyeong Min as an argument escalates and Ru Na ends up leaving a mark on his face. Upset by what happened, Gyeong Min retreats to the study, where he drinks with his father and eventually falls asleep.

Ru Bi's proposal receives strong praise and earns her a position in Marketing. Meanwhile, distracted by Ru Bi, Ru Na makes a mistake during a live broadcast, and when the microphone is passed to a foreign audience member, she gets flustered and pretends to faint to avoid the embarrassment.

After being forgiven by her in-laws, Ru Na returns to work. Meanwhile, Ru Bi's proposal wins the grand prize, leaving Ru Na in shock and completely confused as to how Ru Bi managed to submit it since Ru Na had already stolen Ru Bi's laptop.

After a tense fight with Ru Bi, Ru Na becomes suspicious that her lost memories may be returning when the accident is brought up again. Meanwhile, Cho Rim feels upset by Gil Ja's unfair treatment toward Dong Pal compared to other sons-in-law.

Gyeong Min officially takes part in Ru Bi's project, giving them more chances to work closely together. Meanwhile, Ji Hyeok feels conflicted after unexpectedly seeing Cho Rim at a restaurant. As Ru Bi and Gyeong Min spend long hours away for meetings, Ru Na starts feeling anxious about their growing connection.

During the company retreat, the group splits into hiking pairs, with Ru Bi paired with Gyeong Min and Ru Na alongside In Su. As In Su looks out for her along the trail, Ru Na finds herself unexpectedly moved by him. Meanwhile, Ru Bi and Gyeong Min realize they've lost their way.

Gyeong Min is left confused after hearing Ru Bi call him "Gyeong Min." Ru Na becomes upset when she sees Ru Bi's scarf that Gyeong Min never returned. As tension builds in his marriage, Gyeong Min decides to keep his distance from Ru Bi for the sake of his relationship with Ru Na.

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