This is a short film which Kim Soo Hyun took part in when he was student in 2008.
Zhang Lina, a Chinese girl, takes a one day trip to Seoul to commemorate the first anniversary of meeting with her late lover, Jae Hwan. While asking around the address, she meets Han Hyun Min, a Korean student. Together with Hyun Min’s brother, Han Hyun Joon, the three visit places in Seoul.
(Source: la_penseur_solitaire at MyDramaList)