Korean Entertainment Industry

Main characters are idol trainees in an arts high school aspiring to become idols in the Korean music industry

Main characters are musicians, including a second ML who is an idol (from the 90s)

ML is the idol Yeo One (PENTAGON) playing a fictionalized version of himself
Plot does not focus on the entertainment industry for the most part, aside from the fear of dating scandal aspect; Very little is shown of Yeo One's idol life

Main characters are idols

Main characters are all idols; FL is an idol in a struggling "nugu" (unknown) Kpop girl group who have one last chance to strike out in the industry before disbandment

Main characters are all idols; covers the struggles of both "nugu" (unknown) and famous Kpop groups within the industry, dating scandals, sasaeng fans (stalkers), etc.

Main characters are either idol trainees or idols

ML is an idol; FL is a former idol trainee

ML is a music producer for a Kpop company; second FL is an idol
Features substantial subplots regarding music production.

ML jumps from another universe & time to land in the body of an idol in present-day Korea

FL is an idol manager at a Kpop company; ML is a musician, secondary characters are idols
Plot heavily focuses on singer/songwriters and idols in the Korean music industry