Monstar

both dramas are similar in the sense that both the mains are going to a music school and play some sort of instrument.

Both drama are school related dramas and both involve people whose passion is music.Also both have kpop idols staring-Big Bang's Daesung for What's Up! and B2ST's Junhyun for Monstar

Monstar is music with story and Over the Rainbow is bit more mature story with music.

They are both music dramas and they both have orchestras. They are also both rom-coms. Monstar is a little darker tone than Nodame Cantabile, but they are both about finding your dreams

Both stories are about young people, who search themselves and manage to live through music.

This drama is also about high school and music. Dreams, love, bullying, problems and getting over.

This drama is about a High School boy band and their lives. A come to age story about teenagers overcoming their problems and fighting for their dreams.

Very musical and school-related.

The leads have similar pasts. They're both music dramas, the music is amazing in both.

Both dramas give you the same feel. Both high school dramas, and highly recommended for Rom-Com lovers.

Monstar reminds me so much of love in disguise... The plot is very similar in the way that a star goes to school and falls for a girl who in the beginning dislikes him and likes another guy.

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 dramas are about the main character's passion for music. Monstar seems to have a slight dark side to the plot that later resolves itself.

it has the same plot as it is all about the music industry, also in the drama you will find some famous k-pop idols (i will keep that a surprise)

Saijo Akane, a drummer who was ousted from her previous band just before her debut, is unexpectedly chosen by Fujitani Naoki, a reclusive and brilliant musician, to join his new band, TENBLANK. Together with band members Takaoka Sho and Sakamoto Kazushi, the band gains fame through Fujitani's distinctive compositions and their electrifying performances. As TENBLANK rises to stardom, they face numerous challenges, and Akane's journey from obscurity to stardom unfolds as Fujitani's secrets emerge. Will the band withstand the storm, and where will Akane's heart lead her?