In the controversial clip, Dino is captured sending a sweet message to someone named Min Kyung. He states, "Min Kyung, I love you very much too." He then blows Min Kyung a kiss. 

According to netizens, this person named Min Kyung lost her phone and someone who found the phone has leaked the video online. 

SEE ALSO: SEVENTEEN challenges viewers in interactive 'DARE OR DEATH' trailer for 'HAPPY BURSTDAY'

Meanwhile, fans claim that Dino has mentioned ''Min Kyung noona'' in the thank-you note section of Seventeen's album in the past. 

It's claimed that Min Kyung is an employee of Pledis Entertainment and Dino's current girlfriend. 

Carats are extremely shocked and demanding feedback from Pledis Entertainment. Comments stated, ''Hul, what is this??", "I can't believe it", "??? Isn't Dino underage?"

Some are also criticizing the person who leaked the video, stating, "Isn't it illegal to leak personal stuff?", "No respect for idol's privacy..."

Is Min Kyung really Dino's girlfriend? What are your thoughts on the video?

[Thanks to everyone who sent this in.]