You Are My Destiny

This is the original Taiwanese version of this drama. Same plot, same characters, just different country and different actors.

Two people get into bed by accident and make a baby ...
he is a chaebol she is his employee

and after many struggles, they become a loving pair with several kids

If you enjoyed the Korean drama "Fated to Love You," you won't want to miss its Japanese adaptation, "You Are My Destiny." This delightful version takes the essence of the original story and adds its own unique charm. In a refreshing twist, the grandma in "You Are My Destiny" becomes a cupid to their love story, unlike the original.
With a talented cast and a dose of Japanese flair, this series will keep you entertained from start to finish. Prepare for heartwarming moments, laughter, and plenty of twists and turns as destiny weaves its magic. Don't miss out on this delightful Japanese version of a classic love story!

-Poor Female Leads
-Rich Male Leads in a position of power
-Contract Romance and Marriage
-Cohabitation
-Male Lead has girlfriend in the beginning that the Female Lead "ruins" by events out of anyones control
-Sweet Second Male Lead
-The Second Female Lead and First Male Lead try to continue a relationship before guilt for the Female Lead gets in the way for the Male Lead
-Annoying Time Jump

Both are about women that have one night stands that end up in pregnancy.

another remake of the original fated to love you from Taiwan
This drama is the story of an ordinary girl, Mi Yeong, who has neither outstanding looks, a prestigious college degree, nor any other charming qualities, facing her whole life abruptly changing when love comes knocking at her door. While on vacation, she accidentally happens to spend one night with an unknown rich man and even gets pregnant from that night. Because of this incident, her life will never be the same, and this fateful encounter brings love that transforms this not-so-special girl to an attractive, charming lady.

The stories don't have much in common but I have read many comments (and I agree) finding the two male leads similar. It's true that they seem to have a cool and collected façade, but both have a very strange, irrational part to them that is revealed as they fall in love with the female lead. One of the most striking illustrations of this is their "demented" laugh. Also, both actors (So Ji Sub and Jang Hyuk) are more "mature" actors (37 and 38) that play mainly in action type dramas, and both Master's Sun and Fated To Love You are their first rom-coms in years.

This drama is another adaptation of this series. Both follows to same heartbreaking story of the triumphs and turbulences of the the two main characters.

Romcoms.
One night stand between strangers leads to pregnancy and engagement/marriage.
Both star actors who had previously worked together before- DK leads were in Beach Boys (1997) together, and FTLY leads were in Successful Story of a Bright Girl (2002) (and have actually done a total of 4 projects together since).

- FL gets pregnant unexpected
- FTLY FL knows who the child's Father but WTV FL doesn't know yet
- Comedy/Romance

Genres: Business, Comedy, Romance, Drama
Tags: Rich Man/Poor Woman, Eccentric Male Lead, Pregnancy, One-night Stand, Nice Female Lead, Contract Relationship, Hardworking Female Lead, Naive Female Lead, Rich Male Lead, Marriage Of Convenience

Seven years ago, top star Kanzaki Ren and college student Moriyama Suzu spent a night together at a hotel. Shortly afterward, Suzu secretly became pregnant with Ren’s child. Since then, she has raised their son, Yu, on her own, working hard to make a living as a single mother.

One day, Yu is seriously injured in an accident and requires expensive medical treatment. Driven into a difficult financial situation, Suzu unexpectedly finds work at Kanzaki Productions, the company headed by Ren himself. Their reunion after seven years sets their fates in motion once again. The existence of Yu, secrets hidden within the Kanzaki family, and Suzu’s own surprising origins gradually come to light.

As truth after truth and conspiracy after conspiracy is revealed, Suzu finds herself drawn into a series of trials and challenges. Can she and Ren overcome the many obstacles before them and ultimately find true love together?

Fated to love you and Because this is my first life are great Romance drama with after marriage love story and romance, in both drama their is a contract between couple,
Highly recommend this drama along with other drama mentioned.
Both has interesting romantic story with little melodrama content and Comedy

Both are very sweet romantic comedies. Both male leads have eccentric anti-social behaviors at first, but after they meet the sweet, naive, lovable female leads they start to soften up and become amazing SOs. 30b17 has a more serious social message and life lessons, but most of the show is light and funny. Both couples end up falling in love after living together. Both shows will give you second male lead syndrome and both shows will launch them into first male leads because of how lovable they were in these shows. Both shows have time jumps though most people will be very happy with the one in 30b17. Both are sweet love stories with very funny quirky characters. Both shows are about very artistically talented leads. They will both leave you with very warm fuzzy feelings.

24-year-old Murakami Maiko is a very sheltered girl who has never had a relationship with a guy. It is decided that she will go for a matchmaking session with someone recommended by her father Genichiro who owns a company. The man Hanasato Harumi is 20 years her senior and also a divorcee. Although Maiko is less than thrilled, she discovers when they meet that he is a charming man with an air of maturity and she instinctively makes a move on him. Harumi had intended to meet Maiko once before he turned her down since she is the daughter of the CEO of an important client. However, she turns out to be more than he had imagined. Maiko confounds him the whole time but he is attracted to her straightforward, pure, and dignified nature. He accepts the completed marriage registration form from her on their third date after she presses him for a kiss. They get married despite their 20-year age gap, and their life as newlyweds begins.