While not a body swap drama, the Main Leads share each other’s pain/emotions etc. From what I’ve seen, the funny scenes are quite similar and there are topics from the female/male perspective discussed like e.g. periods. The FL are also both strong and (at least in LU) the Main leads learn through each other.

While in Beside You only the cat turns human and is the love interest, in CMS both deceased cat and dog return reincarnated to their owner, the dog being the love interest.

A Drama that has the same actor as the Main Lead. If you like him here, you may like him there, since the story both center around school romance.

They have a similar set up and consist both of a man who wants to avenge a death in taking an organisation/corrupt city officials down.

It has a similar format and is usually also formatted with one big event in 2 episodes. Games/concepts are also used by both with the addition of humour

The first meeting between Na PD and Seventeen. This Special started it all, the special with all the members and following with that this series.

The prelude to NaNa Tour. This the the show where they decided on the wish to participate. It has also Na PD in it.

Both deal with parallel universes and a celebrity ending up with another life situation as previously. Also the way they cross universes is similar.

Has the same main plot line. Two academic rivals who know each other since childhood develop feelings for each other, aka enemies to lovers trope. It is also in a university setting.

Both dramas are about a protagonist who is/was not happy in life and is thrown into a new situation (game/past). While fixed on a mission in the new scenario (make Yeowoon happy/protect his father) they discover the main reason why they are there: To be happy themselves and enjoy their youth. Both dramas have an amazing Ost and great acting, not to forget are filled with love for the project by the cast and the staff working on it.