Five Enough

This story however different than “My Father is Strange” gives you exactly the same kind of feelings. The humor and the frustration when you have to deal with intrusive in-laws is exactly the same in both drama.

Both are family dramas with cute romances, light angst and heartwarming situations

Though at first glance these two dramas don't seem that similar cause Five Enough is a family drama while Gentleman focuses on four best friends, a lot of similar plot lines can be found in both so if you've watched one and you're craving a similar story, you might find it in the other. Both are ensembles shows that focus on friendship and familial love alongside romantic relationships and characters who are school teachers and golfers.

Both shows also have a love line where female character A has been in love with B but B falls in love with A's best friend C so A finds comfort in D who's related to B and eventually A and D fall in love. There's also a widowed character in both that finds love once again and children that cause bumps in relationships.

Both are family dramas about a divorcee mother and a widowed father coming together and becoming one big family. Each family member have their own interesting story and their own obstacles to overcome.
Both dramas are heart-warming, with funny and light-angst moments, and entertaining.

Not much as about pregnancy (a side couple does experience unexpected pregnancy and another unfulfilled wish for children) or even has a contract relationship, but the respective children of the leads end up living together as one family after the leads (re)marry each other. So the theme of loving relatives and kids not of your own blood is quite present here too (later on)

Plus the secondary couple Sangmin/Yeontea in here remind me a LOT on the romantic dynamic of the TRHC leads, indeed.

Sangmin = prior playboy, never in a serious relationship till meeting YT, is super head over heels for her and showering her with puppy-like adoration. YT changes his life for the better, makes him rethink all prior beliefs.

Yeontae = school teacher cares a lot about ppl around her, very diplomatic and nice unless she is pushed too far. Feels the need to deal with problems on her own instead to ask for help, doesn't want to be a bother to others. She is way more reserved with her feelings, needs a lot time to get comfortable with any display of or receiving affection. Very set in her way, stubborn once her mind is made up and need a lot of convincing to reconsider something.

Plus they started off disliking each other too, until SM fell first for her and started to woo a very reluctant YT in a very adamant golden retriever fashion like Taekyung did with Yeondoo. So if you love the (romantic) dynamic of the TRHC leads with ML being head over heels and FL more reluctant, you find more of the same goodness in Five Enough's secondary couple and their story trajectory (minus pregnancy angst of course)