2AM's Jinwoon posted a photo giddily posing with Korean rock legend Deulgukhwa.

"I learned so much!!" Jinwoon posted excitedly to his Twitter earlier today. "Definitely Deukgukhwa, hopefully forever.. ?? Thank you so much for allowing me to see this performance!!!!!!! Deulgukhwa forever!!!!!!!!"

Deulgukhwa, formed in 1985, is one of the longest-lasting and most popular rock bands in Korea. Here's a sample of their music: