These two series have something in common, namely "being thrown into the past", overall the form of the story is the same, but there are several differences such as the form of story conflict, characterization, issues, and several other things.

I'm not talking about the story concept, but the background of these two series is similar. The similarity between the two is about the relationship between a customer and a waiter in a restaurant. Apart from that, the main characters of these two series are actually *spoiler alert: childhood friends, one of whom doesn't realize it. #pp

These two films have the same story concept, where terror from telephone calls is the main problem in the story. The differences may be in the entities and story background. These two films have a similar feel of terror, the atmosphere given is also the same.

Even though it has a different story background, Marry My Dead Body has the same story concept as 7 Days Before Valentine. Where the main character wants to return to his old partner. In MMDB: Mao Bang Yu wanted to visit his old boyfirend, with the help of Wu Ming Han, but unfortunately something unexpected happened. Even though they don't focus on that kind of thing, both are supernatural and the main character communicates with astral beings (spirits) who guide or at least provide good experiences for the other main characters.

This series has the same supernatural form, namely an angel who matches humans or at least an angel who helps someone return to their lover. Even though these two series have different plots, the form of the story is almost the same.

If you like the series He's Coming to Me (2019), I suggest you watch the film Marry My Dead Body (Movie). The reason is simple, these two films both have main characters who can see ghosts, besides that they are both tied to a love story. Even so, I need to tell you that He's Coming to Me (2019) has a story form that focuses on mystery and the search for an important thing that the main character doesn't know as well as a strong bL romance. In contrast to Marry My Dead Body (Movie) which focuses more on action, suspense, cases.

"You are Mine" and "Step by Step" have similarities in the form of a story background, where the main character is a new graduate who works in a company, the main character will meet the general manager in his office and try to adjust. This is about the relationship of a new employee with the general manager in a company.