The Missing O Manhwa also known as (AKA) "Untouchable Man ; Giving Man ; 안주는 남자". This OnGoing webtoon was released on 2017. The story was written by Face Park and illustrations by Face Park. The Missing O webtoon is about Drama, GL, Romance story.

Sex can be amazing, not to mention ecstasy inducingly mind-blowing. And Eunsung knows that because 7 years ago, she had good sex (an understatement). She felt the universe crack open to show her its secrets. Too bad she hasn’t had a decent orgasm since. It’s been a long journey, but everyone knows, before you get to “P,” you have to go through “O.”