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Many netizens expressed concerns and complained about the concept of 'Idol School' as it seems to sexualize minors. The show was also accused of having a 'Lolita theme' for the school uniforms and scenes such as spraying water on the girls in white tops. 

At the press conference for 'Idol School', Heechul, who's appearing on the show as the teacher, shared his thoughts about the controversy.

He stated, "There were criticisms about 'Idol School' sexualizing the contestants. Honestly, it's also making me very uncomfortable. Sexualization is a dangerous word. I haven't seen the first episode yet so I can't say anything but it was not like that at all when I was filming. If sexualization was the goal, then my agency wouldn't have let me appear on it."

Heechul emphasized, "There are no parts that have been sexualized. I think recently boys and girls split into groups and fight a lot online. Boys and girls have different tastes in variety shows. I just hope viewers perceive 'Idol School' as a game-like variety show for the girls who're not under entertainment agencies."

As you can see, Heechul strongly stated that 'Idol School' has nothing to do with sexualization. However, netizens disagree. 

Comments stated, "The PD even said he wanted to make a healthy porn... And making those young girls get wet in uniforms and wear see-through clothes are so Lolita", "Did they have to make them wear those Japanese style uniforms to teach them singing?", "The youngest one is like 13-years-old. Does it make sense to make her go into a pool wearing white clothes?", "The concept is like a Japanese porn.."

What are your thoughts on the controversy about the concept of 'Idol School'?