what episode does derek and meredith get back together

Yu-Jin was murdered by her husband Chan-Yeong and his mistress Na Ju-Hui. Shortly after, her sister Yu-Ri is also killed and finds herself back in time before Yujin and Chan-Yeong's wedding. Determined to take revenge for her sister, Yu-Ri decides to marry Chan-Yeong. Just then, her first love Tae-O reappears before her.

In her previous life, Hannah Watts was granted the highest noble title and lived in glory, while Liliana Watts became a young widow. Consumed by jealousy, Liliana murdered Hannah, but unexpectedly, both sisters were granted rebirth together, returning to the day they were both to be married.This time, Liliana fights to marry the financially ruined Keagan Randall, believing she can swap their destinies, unaware she's sending herself to her doom... In the previous timeline, Liliana suffered as a young widow living in hardship, while her unfavored sister Hannah became a Duke's wife, basking in endless glory. Liliana firmly believes her misfortune stems from marrying the wrong man. So in this second chance at life, Liliana desperately arranges to switch marriage partners with Hannah, thinking she can exchange their fates, not realizing she's walking down a path of no return.

After getting drunk on night, Hailey Saul went into the wrong room and slept with Louis Harrod, the richest man in Cloudcity and the heir of Harrod Group. Hailey was stunned as soon as she woke up and tried to run away. But she kept running into Louis and couldn't help but get attracted by him. On the other hand, Louis couldn't stop thinking about Hailey after that night and wanted more chances to be with her.

Haley Watson is a financially struggling college student who was supposed to be artificially inseminated with a sperm sample from her ex-boyfriend and professor, Ben Ferguson, but was mistakenly implanted with the sample of her longtime rival, Justin Crosby. According to the plan, Ben was supposed to give Haley a check after the procedure to help her save her brother, but he backed out at the last minute, claiming he would only fulfill his promise if Haley actually got pregnant. Under constant bullying from her classmate Regina and mounting pressure from Ben, Haley was pushed to her limits. At this point, Justin stepped in and actively helped her with kindness and generosity. Haley's perception of him gradually changed, and she began to develop feelings for him, but she never dared to tell him that the child was his. Can they overcome these challenges together and ultimately find their way to each other?

Burdened by her father’s debt, Seoyoon ends her relationship with Leejun through a painful lie. While chasing after her, Leejun is nearly killed in an accident. Years later, Seoyoon is raising their child alone, while Leejun returns in triumph. When their paths cross again, old wounds, hidden truths, and unresolved feelings flare back to life, upending everything they thought they’d left behind.

In my past life, I trusted my brother and fiancé—until their betrayal destroyed me. My brother’s girlfriend, wasn’t just my soon-to-be sister-in-law, she was also my fiancé’s secret lover. They stole my company and my life. Reborn with every memory intact, I won’t be their victim again. I’ll take back the crown that’s rightfully mine.

When their marriage certificate gets torn, Lily Walter goes to the city hall to get a replacement, only to discover the certificate was fake. Zephyr Harrison not only deceived her but also registered his marriage with their housemaid just to make the young lady happy. Lily immediately heads to Nolan University, picks out a quality male college student named Caleb Lowe, and plans to have him father the Walter family heir, unaware she’s just provoked a top-tier powerhouse.

To cover for her boyfriend, Nora Stuart admitted to killing someone in a car accident, and she was sentenced to three years in prison. One day, a man found Nora and wanted her to donate her blood to his grandson, Eric Finch. Nora accepted this deal to get out of jail early, but only to find out her boyfriend had been cheating on her with his boss. Feeling heartbroken, Nora agreed to marry Eric Finch.

Katrina Gibson was once the world's richest woman, but she chose to hide her identity and live quietly as a cleaner. When her daughter was about to get married, Katrina vowed to give her the most lavish wedding imaginable. But on her way to the bank to withdraw money and collect her valuables, she was belittled by her daughter's fiancé's family. Forced into a corner, Katrina revealed her true identity—slapping them in the face with the shocking truth.

After years of cultivation, Zoey was struck by lightning—only to wake up inside a novel as the pitiful girl whose fate had been stolen. Faced with the Stuart family's cruelty, she fought back with her fists—and accidentally ended up with a virtuous fiancé. Using her spiritual powers, she uncovered the mastermind behind the Fox family's misfortunes and suddenly found herself pampered beyond belief.

Yana Yawner, the Divine Doctor, was determined to fulfill her mother's last wish and become a grandmaster by studying the Poison Manual. However, the book was a treasured heirloom of the Gayton family, and the only way to get it to marry into the family and bear a child. Meanwhile, Zackery Gayton was desperately seeking the Divine Doctor for his adopted son's mysterious illness. The two got married out of convenience and, through a series of misunderstandings, gradually understood and fell in love with each other, living a happy life ever after.

The mysterious secret agent Peter Rogers was awarded the National Medal of Honor by the President and had retired from the military. While dining out with his daughter Leslie, Peter is mistaken for a blind date by the beautiful CEO Sydney Greenfield, and the two unexpectedly get married. When his classmate and ex-girlfriend, who were unaware of Peter's true identity, encountered him again, they subjected him to various insults and ridicule. Upon hearing about this, Sydney publicly revealed that Peter was her husband, putting everyone to shame.

Susan Todd, heiress of the wealthy Todds, was abducted as a child and subsequently rescued by Hans Lawson. In gratitude, she marries Hans, who is now the CEO of Lawson Group. Hans has been searching for the little girl with whom he made a marriage pact back then. Unaware that Susan is the one, Hans forces her to divorce, only to be overcome by regret when Susan reveals her true identity later on.

After growing up in an orphanage, Nancy Swift was found by her family, but she found that her brother,Harold, was seriously ill. Nancy worked day and night to make money to cover Harold's medical expenses. Actually, the reason her parents brought her back was to make her marry the son of the Peters family, Jeffrey, who was mentally challenged. How would Nancy choose? Would she live happily with Jeffrey?

Theo Lynn is a hardworking student trapped in a city where competition is brutal. He only ranks twentieth, but in the capital—where exams are easier—he'd be number one.He often dreams he was switched at birth and belongs there instead. Then one day, the dream comes true. Returning to his biological family, Theo faces rejection from his stepbrother. But he doesn't care—he has only one goal: to get into his dream university.

Misunderstanding his father, Topher, to dislike his mother, Rain, six-year-old adorable child Hulk yearned to reunite with his biological mother. Upon finding Rain, he endeavored to forge a strong connection between his parents, aiming to mend their relationship. However, fearing renewed discord if their true identities were revealed, he covertly assisted in concealing their pasts, playing a role in uniting them and bringing their family back together.

In his last life, Yael Summers wrote several songs for his eldest sister, making her a famous singer, but his brother Zayne took the credit. After being misunderstood by everyone, Yael died on a winter night. Unexpectedly, Yael was reborn and went back to five years ago. This time, he had already known the true colors of his family. So he decided to leave the family, sing those songs himself, and try to become a top singer.

While working part-time as a delivery girl, Trudy accidentally stumbled upon her boyfriend and her sister registering for marriage. Heartbroken, she rushed into a flash marriage with Henry, an Ubor driver. Henry agreed to marry Trudy to appease his mother's pressure for him to settle down, but he had been holding onto a promise he made five years ago to the girl who saved his life. In their marriage, Henry hid his true identity, but as they spent time together, he gradually became attracted to Trudy and realized his feelings for her. At the same time, under Henry's care, Trudy's heart began to open up to him, and she unexpectedly found herself falling for him. Just as Trudy worked hard to earn money and nurture their marriage, she discovered a shocking secret: this handsome Ubor driver was actually a billionaire CEO! Even more astonishing, Trudy was the girl from five years ago!