Responses
There are actually 2 volume drama CDs of On or Off!
https://koonbooks.com/products/on-or-off-korean-drama-cd?variant=43116586926326
Asdffghjkll I did not know or maybe I forgot. Idk how I'll listen to that T.T
Ugghhh if only we have a drama CD or something! Imagine how good Kang's voice will be!