I Wanna Hear Your Song (2019)

Both dramas have Yeon Woo Jin playing a male lead trying to find the truth about his brother's death and intentionally approaching the female lead who is somehow to connected to it without letting her know who he really is. Also, they fall in love.

Both are about uncovering a murder where the main female lead is involved as a suspect, also both are complicated romances because of family members involved.

Got alike vibe. and theme. Not time travel though.
both are about investigation of :past crime: In both ML and FL are tangled together thanks crime which connects them.

Male lead approaches female on purpose. Then they became romantically involved.
Prosecutor Princess revolves around the theme of revenge. I Wanna Hear Your Song is about uncovering the truth behind a mysterious murder.

Both are mystery thrillers with a side of romance. Both make you confused about the characters and keep you guessing for a while.

Both have a male lead approaching the female lead for secret intentions, using a fake identity. However they fall in love and end up in a taboo/impossible love situation.

they are both related to the orchestra setting.. and both girls are kinda "eccentric" but in a good way xD

orchestra them dramas
i personally didn't like IWHYS and i'm sure park eunbi won't disappoint me as always

Both are classical music-oriented and concerned with deep stories the acting is impressive and a very satisfying and realistic challenges that touch your heart

reminds me of because both female leads experienced some kind of traumatic past that was so painful that it led them to unconsciously resort to short term memory loss as their way of coping.

Both drama related to murder. Female lead saw murder and had amnesia. While male lead try to get information from her

It has a similar mix of genre types. Both have Comedy, Romance, and Mystery. Also both have a suspicious lead character. Let's Eat's has a more comedic vibe/I Wanna Hear Your Song has a more melo feel.

Both dramas are romantic comedies with a mystery surrounding the lead characters. The ML in Gong-shim like the FL in I wanna hear your song experiences a traumatic event which leads to them having amnesia. As the storyline develops the lead characters aim to find the truth of what happened in their respective circumstances.