Both are creepy ghost stories. Both are based on actual places that exist (Gonjiam Psychiatric Hospital and Taichung Tunghai University) and a form of live streaming is used on both. (Gonjiam is more full stream, whereas Bridge is more clips of streaming)

Taemin as a performer is in both. If you enjoyed " Taemin the 1st Stage Nippon Budokan" you'll enjoy "TAEMIN Japan 1st Tour "SIRIUS"" or vice versa.

Both were Japanese releases for their respective concerts and released onto dvd/bluray for the fans who did and didn't attend.

Bot include performances by Taemin as well as beautifully done VCR clips made specifically for the concerts.

Taemin as a performer is in both. They are concerts he held that were then released onto dvd/bluray for the fans who did and didn't attend. Bot include performances by Taemin as well as beautifully done VCR clips made specifically for the concerts. If you enjoyed "Taemin the 1st Stage Nippon Budokan" then you'll absolutely enjoy "Off Sick " or vice versa.

Both involve identity switching to protect someone of high status. Both are historical dramas with the following included genre's 'romance', 'drama', and 'political'. Both are also set in the Joseon Dynasty.