To mark the one-year anniversary of the hit rookie group Busker Busker, member Jang Bum Joon set up an impromptu, unannounced concert in front of Sangmyung University, his alma mater, earlier in the week.

As evidenced by various short videos uploaded to YouTube, he is seen taking requests from the public, going through several of their hit tracks.

Check out some snippets of his performance!