YouTube reaction videos are staple for many K-pop fans. Though some reactions may be hilariously amusing, others can evoke tears. 

In the case of William Roeben, known as NearlySeniorCitizen Yetagamer on YouTube, unexpected tears were shed while filming his reaction to VIXX's "Error" music video for the first time.

In the video uploaded on Feb. 7, Roeben, a 52-year old disabled verteran of the United States Air Force, began praising the production quality of K-pop music videos within seconds of VIXX's music video.

However, just a minute in, fans began to notice the YouTuber's face looking sad when flashblacks of the couple in the video were shown. Getting choked up in his own comments, Roeben burst into tears.

"I didn't expect that to affect me like this," Roeben said as he admitted that the music video reminded him of his late wife that passed away two years ago.

Upon opening up to his followers on a very private and personal matter, he was met by an overwhelming response of love and support in the continually growing comments section for the video. 

In addition, fans of VIXX are spreading the video on social media for VIXX to see the emotional reaction and are donating to Roeben's GoFundMe campaign to support his financial needs.

Check out the reaction video below: