South Korean actress Go Min-si is suspected of school bullying, theft, and verbal abuse, according to an anonymous post that was uploaded on a popular online forum on Sunday.

The post accused the actress of being a bully during her middle school years at Jungri Middle School in Daejeon, which caused a sort of uproar from the public.

In response, her agency, Mystic Story, issued a swift denial and announced legal proceedings to defend the actress.

"The allegations are completely unfounded and based on false information," the agency said in an official statement released Monday.

"We have confirmed directly with the actress that these claims are untrue. We stand by our artist."

The lengthy post, titled "We Are Victims of Actress Go ○○", accused Go of habitual theft, mocking and threatening students with disabilities, and physically assaulting female classmates.

The writer, who claimed to represent a group of former students and staff, said the intent was not revenge but to raise public awareness.

"It is difficult to believe someone with such a past is now in a profession that receives public admiration," the post read. "We are not seeking an apology or compensation but call for a halt to her public activities."

Mystic Story stated that the matter had previously been investigated when similar rumors circulated and that the current claims were a resurfacing of those earlier allegations.

"The malicious content based on falsehoods is seriously defaming our artist," the agency said.

"We have appointed legal representation and are preparing both civil and criminal actions against the spread of false information."

Go, 29, is known for her roles in dramas such as Youth of May and Sweet HomeShe previously became embroiled in drama in 2020 when pictures surfaced that allegedly showed her in an adult entertainment venue prior to turning 18.

At that time, she apologized publicly, calling the incident "a mistake from her youth."

The new allegations have led to renewed public scrutiny and divided opinion online, with some users demanding accountability and others urging caution until legal proceedings clarify the facts.

Mystic Story said it would pursue "all possible legal avenues" against those spreading defamatory claims, and asked the public to refrain from further speculation.

As of Tuesday, no formal charges have been filed, and the identity of the accusers remains unknown.