My Little Bride (2004)

Both have similar stories: young, high-school-aged wife with an older male arranged by their grandfathers.

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.

Both films feature the same female lead playing a character who is considerably younger than the male lead. The stories are sweet, heartwarming and funny.

Common :
1. Marriage for convince.
2. Gradual love post marriage .
3. Same female lead
4. Innocent FL

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.

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 have minor school girl one marry to older man other marry minor man as her this marriage force by their parents both couple find it awkward so keep it secret in both couple one of the partner is positive toward this marriage and for other its burden

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 have arranged marriages set up by grandfathers. The bride in My little bride is also in high school.

Both female leads are married off due to the promises made by the grandfather to an old friend.

Both dramas reflect the confused emotions of growing age.
Innocent and mindless girls are in search of love.
marriage in adolescence (girls)
boys have to take care of girls.
Very cute innocent love story after marriage
both FL are student and ML are professionals
in both ML , love FL but FL not initially

Eun Mo is back in her hometown, Paju after spending three years of soul searching in India. However, the reality she returns to is far from comforting as she is faced with a dreaded reunion with her widower brother-in-law, Joong Shik. Almost a decade ago when Joong Shik came to Paju as a student activist fugitive, Eun Mo never took a liking to Joong Shik who ended up marrying her older sister, Eun Soo. But she was forced to live with him when a tragic accident took her sister’s life. During a course of three years, Eun Mo gradually discovered she was carrying complex emotions toward Joong Shik. Having felt trapped, she decided to leave Paju. Eun Mo believed she had resolved all emotional conflicts in India, but as she digs further into her sister’s death, she becomes torn between the truth and her feelings for Joong Shik.

Relationship between an older guy and younger girl.

They're similar because both of these stories are about younger girl (high-school student) and older guy (teacher/temporary teacher). Both stories are very cute <3 In My Little Bride they're a married couple.