The INFINITE members have been spotted hard at practice for their upcoming 'That Summer' concert!

Themed after a 'summer vacation', the boy group is working hard to make the concert a 'vacation' fans will never forget.

Member Sungyeol especially caused much laughter among the visiting news crew by stating, "I'm bare-faced right now so I don't think taking photos is going to work for me."

Although known well for their 'precise choreography', the members of the boy group plan to showcase a variety of other performances during their concert for it has been revealed that the group will be putting on special unit performances, one of which involves members transforming themselves into members of a band:�L on the guitar, Sungjong on the keyboard, Sungyeol on the drums, and Dongwoo on the bass.

Dongwoo commented, "Time flies when I'm practicing (the bass)" while leader Sunggyu grumbled, "There's so much to prepare and so little time left until the concert", expressing his worry. The concert is said to be extra special as the members of INFINITE personally participated in the concert's early preparation stage.

See how the boys heated things up during the rehearsal in the photos below!

[gallery columns="4"]

Source + Images: Sports Hangook, Daum

[Thanks to everyone who sent this in!]