What's the name of the other Korean dirty comedy film?

I saw only one minute scene of the movie, especially a dirty part.

A guy woke up from his sleep in the morning. Right after he opened his eyes, he saw a hot korean girl posing and teasing him (Don't know if she was just an illusion or not). The guy then proceeded to masturbate on her. His bad and good conscience showed up in cartoon form at that moment.