Recommendations

Both of them are based on Josei mangas. While "Please Love the Useless Me" has a more funny approach, "Hapimari" is a bit more serious. Both of girls are in a difficult financial situation and the main lead help them.
Also, Dean Fujioka is the main lead in both of them!
Enjoy :D

Also by TVN, these two dramas are so similar in how they don't follow typical romantic drama stereotypes and aren't afraid to push the boundaries. Some common actors for both. Nice comedy and quirky romance with really engaging storylines that don't get old.

If you like this, you will definitely enjoy Marriage Not Dating!!

both films are pretty bizarre, with crazy yakuza and a charismatic main character, also the same director (Miike)

The story of this show is about the unifying of the three kingdoms ( Goguryo, Baekji and silla). By the way the actor who plays the role of the main character is the same actor who played the leading role in dae jo yeong >>> ((Choi Soo Jong)).

If you liked king gwanggaeto then you'll absolutely like this show .

both of them are based on a true story of a man who has the dream to do something great for his nation.

In both shows we can see fatherless main leads, who travel back in time in order to learn about past. Both shows contain romance, but Time traveller 's ending is more bittersweet(or just sad).

both about a slave who has ambition to be free and put his name in the history.

Both feature mystery in a form of a game. The Liar Game just includes stakes.

While the plots are different, Sakurai Sho plays in both of these dramas as very similar characters. Both characters are eccentric and have very similar mannerisms and catchphrases (Iiii neeee~ vs Nantsutte~) and both have dark secrets they are hiding. If you liked Sho's character and acting in one, you will enjoy him in the other.

Hotel King remembers me That Winter the Wind Blows in many ways. They have similar storylines based on power struggles. Both female leads are orphan heiresses, and both man leads wanted at first to take advantage of them before falling for them. In both dramas, one of the two main protagonists believes the other to be his/her sibling.

They also share the same atmosphere, I felt the same way watching those shows, with all the background manipulations and the constant danger threatening the main protagonists. Both hook you in a way that you can't resist the envy to watch the next episode.

I really think that people who enjoyed Hotel King will enjoy That Winter the Wind Blows. The main actors are really good. The main actress did a great job at playing someone blind. I love her character, who, despite her blindness, has a real willpower and does everything to stay strong.
Moreover, this drama does have something really poetic, and is esthetically really beautiful to watch.

Both dramas are about women around 40 with their struggles about marriage, carreer and children. Also, both have Naohito Fujiki in the cast.

They both star Naohito Fujiki and they're both about an older woman close to 40 who starts dating a younger man

Both dramas started when the leads were in their college days. On both dramas , the leads get separated by some circumstances and met again after several years and was not able to forget each other.

Both are short, humorous dramas that star rowdy high school students getting into trouble due to their over-confidence.