Recommendations

Both are set in a school environment and friendship plays a big part.
Each has it's one problems, that the characters have to tackle, but they give off a similar vibe.

Both are school themed dramas with a cute romance touch and they both have bullies that will make you want to punch the screen and many other similar things in common. ..

Many things in this drama reminds me of angry mom..ofc the story is different but the mood is similar ^^

In both of this drama the main focus is the intelligent and powerful dialogues and they are both directed for a more mature audience.

You'll love this if you want a vicious villain like in I Hear Your Voice. Shin Sung-rok acted as one perfectly. It's about a fierce competition over money that depends on trust, (lies), and deception. A favorite of mine! The story will keep you watching until the end (and wanting more). Also, Lee Sang-yoon and Kim so eun made a great team.

IT'S better to watch it in order the X family is the 2nd season of KO ONE and then after watch KO3 an GUO it makes you understand the series much better.

Both female leads are supporting actress or "nang'rai" who fall for cops.

In Nang Rai Sai Lab, the female lead goes to work with the cops on their case, while here the female lead tries to find an answer to her own personal mystery.

[Spoiler] The third episode of this drama and Sirius are sharing the same theme, all about drugs, also again with the presence of Seo Jun Yeong in both of the two, with an excellent representation of handsome Seo Jun Yeong, you can see how he can play an evil character as his excellent performance in Sirius!

[Spoiler] this movie and the first two episodes (1&2) of the drama are shareing the same theme, about one crazy man fascinated by beauty, so he kills women to creates his own woman from other bodies (the parties of his victims).

Both dramas have female lead as teacher in the ancient academy, see how they manage the naughty students and how interesting they handle the lessons. Both have romance involved, also bickering otp at first. There are also cute supporting characters inside.

Both deal with eccentric genius male leads who use their smarts, and slightly twisted mind to solve murder cases.

Love the second leads in both of these dramas. It is for different reasons but both of the leading ladies have a ruddy unattractive appearance. Both dramas follow the usual Rom/Com formula (leading man is successful and handsome/leading lady is hardworking and has a good heart). In both dramas the leading man is drawn to the leading lady due to his own insecurities/fears.

Love the friendships in these! Both are about supporting your friends as much as they are romantic comedies. In both of these dramas, the leads knew each other as children.

Both movies are based from true events. Both are about patriotism and perseverance. :)