One of Korean rock band Nell's most prominent fans, INFINITE member Kim Sungkyu, recently attended their concert in Seoul.

When K-Pop idols are asked who they were fans of growing up, there are a few common answers: Michael Jackson is often noted, as are early K-Pop acts like H.O.T and Seo Taiji And Boys.

However, Sungkyu has always been known for his unending affection towards Nell, and has been known to attend their concerts. He attended their final Newton's Apple concert in Seoul on April 6.

Fans on Twitter have also said that fellow INFINITE members Dongwoo and Woohyun attended the concert, but have only posted pictures of Sungkyu.

Although there are no official pictures of Sungkyu or any other INFINITE members at Nell's latest concert, fans have been posting pictures on various SNS accounts. Sungkyu was sporting a new hairstyle, which hints to an upcoming INFINITE comeback.

INFINITE has stirred comeback rumors ever since releasting a teaser video at their concert in Seoul in February. They have been reported to be filming several music videos for their upcoming album. 

While idol groups are the most prominent musicians in Korea, Nell is extremely popular. The band had four concerts between April 3 and April 6 at the Blue Sqaure Samsung Card Hall in Seoul. The concert hall can hold over 4,000 people between seats and standing room.

Both Nell and INFINITE are under the Woollim Entertainment label, and have been known to work closely together in the past. While some of the other INFINITE members have been known to attend Nell's concerts, Sungkyu has consistently attended.

Sungkyu has not only covered Nell's songs before and was inspired by the band to pursue a musical career, but Sungkyu also reportedly auditioned for Woollim Entertainment after meeting Nell's manager while he was working at a café.

Nell has publicly supported their fan Sungkyu in numerous interviews. The group's lead vocalist, Kim Jongwan, wrote "Shine" for Sungkyu's solo album, Another Me.