Prime Minister and I

Both dramas are about a contract marriage between starngers - or almost strangers - which turns into real love. In both dramas too, the male lead is a more serious person, and the female lead is a more clumsy person, so they have to set rules about living together.

Both MLs are widower,
Both MLs have 3 kids to take care of,
Both FLs come from poor family
Both FLs help ML in raising/ tutoring MLs kids

Both series involve a young, naive, and silly girl forced into a marriage with a serious, cold guy. She then has to learn to behave in a certain way as she is thrust into the public spotlight. In Goong, the guy is the crown prince while in Prime Minister and I he is the Prime Minister.

both have contract marriage turning into real romance.

In both shows a young female enters a widower's home and takes care of the man's three children. In MMJS, there is an added hidden identity plot point.

Contract marriage, older and not conventionally pretty male lead. Sweet, but not shallow.

-both about single fathers who have multiple children and marry another woman
-both have family and romance genres

I am surprised nobody recommend this
it gave similar feels since ep 1
both family series and children make it cute
while there is still some seriousness with the main couple and some romance

If you want to watch sometning abouut contract marriage then you can try with this drama. Prime Minister is a cold person who has to take a mariage because someone took the photo them and wrote in whole magazines about Prime Minister's lover.

both feature successful (rich) single fathers who end up contract marrying girls from relatively humbler backgrounds, with stiff cold MLs and bubbly warm FLs. But with time the marriage becomes real and the MLs too show their sunnier sides.
The difference is that in UL, the ML is adoptee father of his nephew.
The USP in both is the kids--3 in PM&I and 1 in UL.

Both stories involve a marriage contract, but Prime Minister and I has less melodrama.

Both dramas have a common theme of keeping a marriage going just for appearances. Both funny and have great actors.

So basically the ML are very devoted to their wives even after their death and the FL is as always quirky and persevering and tenacious and funny, difference is she is single and childless.Also the kids are really awesome and even more mature but for prime minister and I, there are only 3 kids

Both MLs are widowers with 3 kids to take care of. Both FLs come from poor families and help raise/tutor MLs' kids.

Both involve a young woman which's life suddently turns in such a dirrection that she has to take care of few children, which aren't her own. She has to lie about her life and live into a rich man's house. In those dramas the male leads are somewhat agressive towards the female lead as they suspect her honestly loving them (which was the case at the begging).