Destruction (2021)

Both dramas has the same vibes. Family and friends are the best part.
Both dramas about FL who has terminal illness.
Both FL have strong characters.
Both drama has cold heart character ML.
Both FL at first just give up with life at first until met the ML and they want to be alive in the rest of their time.
The good one is : no love triangle.
Both dramas has good OST.

Both main protagonists suffering from cancer can make contract with "devil" to get extra time to life. In If Cats Disappeared From the World can postman erase one thing from the world and then get extra day to life. In Doom at Your Service Tak Dong Kyung makes a contract with Myeol Mang for a hundred days to live how she wants, risking her everything.

Both the shows have supernatural persona involved. The core concept is same but the story and representation of characters are different.

They have the same vibe. Both are supernatural and in both the main FL has a rather hard life. Filmed in an artistic way with good music and plot.

both female leads have only a certain amount of time to live and they are told that by a celestial being. they end up falling in love and it saves them in more ways than one.

Both FLs have their days numbered and both MLs have this type of 'scheduler/ neither human nor god' role. Both stories tackle the meaning of life and how to make the best use of your numbered days.

Both are fantasy themed dramas about male lead being creature from different world - god and grim reaper and human female lead.

I was really shocked how similar I found those two titles.
Not by story, but by aesthetics.
I thought, I was convinced, that those titles are connected by the same director and yet I was wrong which is amazing.
Still I think that JBL has better acting and music than DAYS (hehehe I just did ‘days’ while typing the shortage of the title, lol).
Yeah, but the vibe in DAYS is like mix of JBL and Goblin.

Yamihara Kokoro and Asada Toramatsu live in a town that is quite peaceful, until a serial murder case happened where the bodies all had their blood drained out. Five years have passed but the case remains unsolved. Meanwhile, Kokoro and Toramatsu have been in a relationship for a year, but are unable to get married as they are keeping a serious secret from each other. Kokoro is actually a vampire. However, she does not attack humans and live modestly. Toramatsu is a popular resident in the town and is trusted by many. After getting a divorce, Toramatsu got drunk and went back to his old house, where he met Kokoro, the current occupant. As the two continue to keep their secrets hidden, a horrific murder occurs once again in the town.

If you like love stories between a mortal woman with a terminal illness and an immortal being, both have this trope. Doom is more slice of life though.

Human in love with personification of death or destruction, hospital setting, melancholy feeling, focus on plants/growing things.

Different in tone but similar in characters and aesthetics. ML is a god like being, FL a human, and their relationship grows slowly. Also in the end, ML disappears, then returns as a human.

In both shows, the Male Lead is a Grim Reaper tasked with fetching souls. One of these souls they are supposed to fetch is the Female Leads'. But, in trying to accomplish their goal, they end up falling in love with her instead.

DAYS feels way more lighthearted than Black, though. While the former starts with some hilarious comedy at first, halfway through the series the crime element of the show turns the series dark (pun intended).

Here the main lead character of the drama is the doom itself. He soon falls in love with Tak Dong Kyung, who has just 100 days left to live. The male lead helps fl in both!!