There are usually a multitude of restrictions, unhealthy labor practices, very little control, and very little financial rewards.
Depending on the agency, K-pop idols are not allowed to date for a certain amount of time.
Because of this situation, the K-pop industry (specifically entertainment labels) were investigated on how they treat their talent.
As a result, slave contracts were brought to the forefront.
Most korean male idols smoke, including exo, so if your bias gets called out for smoking, dont be surprised.
Back in 2009, Hero Jaejoong, Micky Yoochun, and Xiah Junsu pressed charges against SM Entertainment for their 13-year contracts, claiming they were too long, too restrictive, and gave them almost none of the profits of their success.