Recommendations

Both dramas have realistic, natural and healing vibes.
Slow paced
Feeling relaxed while watching.

It is similar in the sense that the main cast is mainly high school boys who are more than a bit crazy weird. They are both really funny dramas while still having a pretty good story. Kyou Kara Ore wa!!? is longer and therefore explores the genre more.

MC (same actor) plays a rather ridiculous, money-hungry, bad at martial arts, but actually intelligent character in both. They are both sort of action-comedies, though it looks like season 2 of Dark Lord is likely going to be, well, darker...

Coffee shop manager cum worker Gumdeol has special ability to shapeshift into a dog and he offers comfort to heartbroken Ah Jung as a dog.

It tells the story of two people whose lives were on parallel lines that were never meant to intersect. Due to an unexpected meeting, they become each other's destiny.

By chance, fledgling art editor Chen Jiaxin and the highly-educated Wang Xiyi who is heir to a huge conglomerate meet on a cruise ship bound for Hungary. Passions flare and soon enough, they exchange their 'I do's'.

Chen Jiaxin becomes pregnant shortly after they married. Ready to choose family over her career, she suffers a miscarriage and leaves heartbroken as she heads to Hungary to pursue further studies. After a series of trials and tribulations and through help from friends, she finally becomes an accomplished potter. Meanwhile, seven years of separation has turned Wang Xiyi into a mature man capable of raising a family. By chance, the two meet again in Hungary.
(Source: ChineseDrama.info)

the original
A really unfashionable working class girl Chen Xin Yi has the desire to tie down her handsome boyfriend to be with her. Due to certain reasons, her boyfriend gets her to go on a love cruise and she started to ponder on how to lose her virginity and tie down her boyfriend. Xin Yi ended up taking cold medicine which made her drowsy and went into Ji Cun Xi's room. Cun Xi is the sole male heir to his family's company and has been in love with his girlfriend, Anna, for a long time. He planned to propose to Anna on the boat but she didn't turn up on the cruise. An island owner added drugs into Cun Xi's drink and Cun Xi became disorientated and returned to his own room. Xin Yi and Cun Xi end up having a one night stand. Xin Yi later finds out that she's pregnant and Cun Xi's grandmother forces them to get married. Will a couple forced to marry for the sake of their unborn child find love with each other?

Pawut is the successor of a large company. Wanida is a secretary in a law firm. They both go on the same cruise, with Pawut planning to propose to Kaekai, his girlfriend, and Wanida planning on losing her virginity to her boyfriend. However, Wanida ended up taking cold medicine which made her drowsy and accidentally went to Pawut's hotel room, while he was drugged. They spent the night together. Three months later, Wanida finds out that she is pregnant.

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.

Both shows feature a forbidden romance between North and South Koreans, both hailed from rich families and encountered conflict as couples fight for their love.

SLs in "2gether" are MLs in "'Cause You're My Boy" and they also start as "exfriends/fake couple".................Very complicated at first then really cheesy afterward

they are practically the same stories...The only difference is that in "love sick" they are in a pretend relationship so that the sister would help convince the dad to let him off the hook when it comes to dating someone

Both involve the main character suffering an injustice and end up buying a bar/pub. It has similar instances of fighting against a larger power with a small group of friends they gain by work in their bar/pub.

The feel of the dramas are quite different with Local Hero having more emphasis on the action/fighting while Itaewon Class has more focus on friendship and youth but the overarching themes of fighting for justice and placing your trust in some friends are similar.

In both drama the main lead can see the past when touching either things or people. There is also a similar style because they are thriller deaming with murder cases. Finally they are all TvN dramas.

It's also about a cat turning into human and falling in love with their owner, just that in I'm a Pet At Dali Temple, the FL is the cat, while in Welcome, the ML is the cat.

Golden Cross also deals with the financial forces behind the Korean economy. Golden Cross is about the corruption of the people in power behind the scenes.