Fans of K-pop star Cha Eunwoo staged a protest outside Fantagio's headquarters, demanding the agency take stronger action to protect the ASTRO member amid controversy surrounding a recent tribute song for late bandmate Moonbin.

The protest, held within the past 24 hours, included LED-lit trucks displaying strong messages directed at Fantagio.

Supporters accused the company of standing idly by while Cha faced a wave of malicious online accusations.

"Cha Eunwoo has sacrificed the most for the team, but he's the one getting attacked the most.

And yet Fantagio is doing nothing, just standing by and watching.

Is all of this happening with Fantagio's approval?" read one message displayed on a truck, according to Kyunghyang.

Another truck demanded immediate action: "Fantagio, get it together. Stop focusing only on making money and protect Cha Eunwoo properly.

The fans are watching, you better do your job right!"

The backlash centers around "Memory of the Moon," a tribute song released April 19 in memory of Moonbin, who passed away two years ago.

The song sees an ensemble cast of 22 artists, all of whom Cha allegedly gifted luxury bracelets to as a small token of appreciation.

Despite the intent behind the project, some online commenters have accused Cha Eunwoo and Fantagio of "using the deceased for profit."

The allegations quickly spread on social media, prompting a surge of negative reactions and concern among ASTRO's fanbase.

Fans are now urging Fantagio to issue a formal response and pursue legal action against those spreading harmful rumors.

"It's disheartening to see Eunwoo, who has done nothing but show love and respect for Moonbin, be treated like this," said one fan on Twitter. "Fantagio needs to step up."

As of Monday, Fantagio had not issued an official statement regarding the accusations or the protest.