Bromance kdramas

Although they met quite recently, the two guys immediately click with each other as if they've known each other their entire lives

As the two main characters progress with their mission of returning deserted soldiers, they get to know each other better and become a great team

A middle-aged gangster possessed a body of a high schooler and eventually becomes a parent figure/friend in the broken life of his classmate
It was heartwarming to see this classmate (and a few other people) finally meet a proper adult and heal from the difficulties of life

One of my favorite  kdramas !! Highly recommend it if you're looking for a comedy with a serious plot
The story is absolutely hilarious and the tension between the two guys is truly one-of-a-kind

(similar to High School Return of a Gangster but is a movie)
A middle-aged gangster and a high schooler switch bodies and try to figure out how to switch back

Duo consisting of a vigilante that kills criminals who weren't properly punished and his admirer who starts helping him

ML and 2nd ML used to be best friends but due to certain events, they're now on bad terms. It's both entertaining and heartbreaking to see their fights and reconciliations (to an extent).
Additionally, both of them have friends and classmates with complicated stories and relationships between each other

A coming-of-age story about a wayward boy band

Two teens from different backgrounds get to know each other as they are advancing in the world of classical music. The due experiences a mix of both positive and negative emotions towards each other due to the flare-ups of complicated feelings such as internal conflicts, jelousy, and desire for validation