Entertainer

Both dramas deal with the concept of aspiring idols and musicians getting second chances at realising their dreams.

Both dramas provide a blend of comedy and drama while offering insights into various facets of the entertainment industry, much like "Aema."

Both dramas heavily feature music and have people using their musical talents to form bands. I believe Entertainer is a better drama though because it features a main character who has been wrongfully accused of a crime and the angst of overcoming the challenges of being a "criminal" while trying to fulfill his dream of being in a band! Kang Min Hyuk stars in it and he is a K-pop idol/musician in the group CN Blue!

story is different. entertainer is assembling of band and trying to fight politics in entertainment business/ trying to become popular
shut up flower boy band is about underground rock band who comes to limelight. make great songs. but they fall apart for various reasons.

but both have great ost. similar not exactly same kind of friendship. same feel on making album and loving music.

Honami plays a newscaster, a tough pro who is capable of stonily reporting even her own husband's death in an traffic accident on air. The plot revolves around Honami's relationship with her late husband's teenage son who she is forced to take in. The show stars popular Kyozo Nagatsuka as the boy's lawyer and her romantic interest. The series also includes a lot of behind-the-scenes newsroom action and depicts the rivalry between the show's director and producer, who are locked in a constant debate over whether new and variety are, or should be, one and the same.

Both dramas are about a music agency, where the guy is the CEO of the company and falls for a girl of average standards.

"Koisuru Caster" is a love comedy set on the news floor that condenses the "conflict," "growth," and "heart-pounding" moments that aren't fully depicted in the main story of Motohashi Yusuke, an assistant director (AD) in his second year in the workforce who aspires to be a reporter but is frustrated because he can't achieve what he wants to do.

"Koisuru Caster" is a love comedy set on the news floor that condenses the "conflict," "growth," and "heart-pounding" moments that aren't fully depicted in the main story of Motohashi Yusuke, an assistant director (AD) in his second year in the workforce who aspires to be a reporter but is frustrated because he can't achieve what he wants to do.

Both Entertainer and Perseverence, Goo Hae Ra are about the creation of a new music band.

Beethoven Virus also has a sort of rag-tag group of musicians come together to form an orchestra in order to achieve their dreams. Both dramas focus a lot on the individual characters and the relationships that they build within their group.

dream high is similar to entertainer i feel like because they are musical students that go to school and go through hardships but end up having fun and falling in love

Both about music industry, boy group - aspiring, but struggling (Top Management)/about-to-debut (Entertainer) and their managers.
Slight glimpse of romance
Entertainer touches bit more serious matters
And finally, both starring Ahn Hyo-seop

Misa, who works at a production company, is approached by her favorite actor, Yuki, who comes in for a part-time job interview. Driven by her own desires, she immediately hires him, and they start working together, but she's so nervous she can't concentrate on her work.

Meanwhile, Sana, an idol also working part-time, starts openly approaching Yuki and closing the distance between them... A love battle begins between Misa, who hasn't been in a relationship in a while, and Sana, the love expert.

Both stories are different but at the same time really similar. Both stories about ruined musicians/producers which found new talents that moved them. Also, both stories are about music, tragedy and love.

Both about the making and debut of an idol band containing men with troubled pasts. Both have big labels trying to stop them.