Recommendations

both have different plot but both are same in huge conspiracy like bluehouse-bomb-blast/plane-crash which involve higher authorities. which Shock the main characters as they investigate, reveals the truth they had not even expected/imagine . both story goes around blue house , country president, national investigation service and both have Female Lead NIS agent

vagabond is more action packed drama than designated

both about a group of youth that investigate crimes/mysteries. Both set in a historical period, tho young blood is set in a much earlier time period.

both set in wuxia historical era. Strong female lead skilled in fighting, both male and female lead are very smart.

Both series are a continuation of a beloved series that focus on either the outcome or snippet of a day/week of one of the BL relationships.

Strong female lead character. Desipte being in historical times, both female and male lead are highly intelligent and scheme against each other, but become romantic interests in the end.

female characters are strong and badass. Both are about an organisation that sends people to uncover mysteries/ do jobs set in historical times. Eventual romance between certain teammates. Young blood is about a government spy orignisation however, wheras bloody romance is about assasination jobs. young blood has a team of main characters whereas bloodyromance has only the two.

Both has badass female characters and intelligent youngsters. Both about a hidden spy academy run by the government. Both about mystery/investigation but imo young blood is more cleverly written and has more intelligent chararcters. Plough department is a bit more silly, but young blood also has lots of comedy.

They are both short films about a vampire and a mortal, one is more like a movie though. TVLND has some romance, but not much happens since it's so short, BV is all romance.

both have tragedy relating to the male lead
both are revenge dramas
ML lover (/ lovers family) cause of tragedy

Similar vibes, both in comedy & characters. It's over the top in the most charming way possible! 'Secretary' has a side charater that also wants to become a star in showbiz cuz of revenge.

The main theme is not the same but the creepiness factor and gore elements are. Shokuzai is way more hardcore though so watch with caution.

I Don't Love You Yet is also a story of two bestfriends that watch and support each other grow through many years. Similar to Hanbun, Aoi, their families are fairly close. They met and were initially enemies when they were in high school but became close friends shortly afterwards. Unlike Hanbun, Aoi, it focuses more on the romantic relationships of the two but the female lead's dreams and aspirations are also highlighted throughout the series.

Both Little Forest and Dad! Where Are We Going? are about kids experiencing the "outside world", while LF is more like a day care, and the hosts are unrelated to the kids

Dad! Where Are We Going? is like a mixture of both 2 Nights and 1 Day and The Return of Superman. it's about celebrity dads taking their kids on an adventure...

OMB is more flexible on which parent --if not both-"takes" care of the kid, and it's a shame that it was never fully subbed then canceled all together, but yeah both are about celebrity parents and their kids ;)