My Little Bride is a Korean remake of My Wife Is 18. Both them are about high schoolgirl marrying an older guy. There are a few more similarities but the storyline and even the personalities of characters are totally different.
Bo Eun is an ordinary high school girl who worries about SAT's and has a crush on her school's baseball team ace, named Jung Woo. One day, Bo Eun's grandfather orders her to marry Sang Min. When they were very young, Bo Eun's and Sang Min's grandfathers had promised that they would become in-laws. Despite their opposition, they are forced to marry because of the strong influence of Bo Eun's grandfather. Bo Eun's undercover married life begins: She pretends that she doesn't have a husband and starts dating Jung Woo. Bo Eun believes that she can manage both men and live a double life. Everything goes smoothly until Sang Min visits Bo Eun's school as a student teacher.
Both are about and older guy marrying an 18 year old for his family, and then eventually falling in love.
Following a failed confession to her first love, female high school student Mikoto Ochiai contemplates jumping off the roof of the school building. However, her thoughts are interrupted by the arrival of Jin Haiba, the physics teacher known for being a slacker and the butt of students' jokes. Calmly, he lights a cigarette and asks for an explanation of the events that led her to this precipice. Rather than dissuade her from killing herself, he makes a request—will she enter into a romance with him before she dies? Together, the two gradually ponder why they should keep living and why they should not love each other in earnest.
Ten years ago, Cheung Sub Sam and Yo Yo Ma got married to fulfil a promise by their parents, only to fall in love with each other for real regardless of their huge age gap in "My Wife Is 18". Now, Sam is experiencing midlife crisis while Yo Yo begins to think that her husband is dull, not aggressive enough, and lacks planning. Edit Translation
Yae, an unremarkable girl working in a café and living with a friend, finds herself unable to afford rent when her friend suddenly gets married, and she loses her job in the same day! It’s only when her boyfriend dumps her that she finally hits rock bottom. She’s at her wits’ end when her childhood friend Takumi suddenly reappears into her life. Takumi suggests that Yae take on a part-time job as his “fake wife” for the next six months. He has his reasons for wanting people to think he’s married. Yae has no other choice but to accept his proposal, and in return receives housing and living expenses for playing the role of his “fake wife.” So begins a “fake marriage” with a time limit. Unbeknownst to Yae, she was Takumi’s first love, even though she thinks of him as nothing more than a childhood friend. Takumi struggles awkwardly but earnestly to win Yae’s heart and find true love. Even though their marriage starts as a sham, will the day come when this couple can become something more?
Yuki Rio, the daughter of an old, prestigious family in Kyoto with over 1,000 years of history, enters into an arranged marriage at the age of 16 with a man she’s never met. Her husband is Takamine Masatomo, a handsome CEO in the IT industry. Every year on her birthday, she would receive 50 million yen, making their relationship one based solely on money. One day, after ten years had passed with no contact, Rio decided to move to Tokyo. She asks her husband, whom she’s meeting for the first time, for a divorce. On the other hand, Takamine finds himself unexpectedly attracted to Rio and doesn’t want a divorce. Thus begins a romantic battle between a wife who wants a divorce and a husband who refuses to let her go.
