Sweet Games

Also, an age gap drama where the female lead is older and the male lead is younger. One is a short length drama while the other is a full length.

In both: the male leads fall in love with the female leads first, at a young age. The two couples have an age difference, female leads being older. The male leads remained in love even when female leads were in another relationship (unrequited love). The female leads focus on their career and male leads support them. The professional nicknames of male leads (DT in Go Go Squid 2 and Heisha in Sweet Games) were inspired by the female leads without female leads knowing. The families in both stories support the protagonist couples. Friendships and teams come together equally with the goal of bringing victory to the team (in Go Go Squid 2) and the company (Sweet Games).

Both series has an age gap where de FL is older than ML. And both are romantic and sweet.
In both ML falls in love first and is warm and takes care of her.
FL is the boss and ML works for her.

Both has an age gap with a FL older
In FIY The ML is more childish than SG male lead, but he is passionate and cute.
In FIY he is an sportsman and she is his trainer.

They both have an age gap, and the male lead is younger than the female lead.

( Similarities )
both are office/ workspace romance
both have one of the leads that had crush on other but didn't date and years later reunite
both main leads have great chemistry
both have strong female lead

differences
Sweet Games ML had crush on fl since university
while in Here We Meet Again FL had a crush on ml since school
Sweet Games leads had a age difference
while in Here We Meet Again main leads didn't have a age difference but the second couple did

The male leads in Sweet Games and Love Me, Love My Voice are famous/successful voice actors.
Both dramas have romance in them.

Both are age-gap dramas where the fl is older and the ml is younger.
In both shows, the male lead chases the female lead first (according to the tags)