In Oh! My Assistant, Seon Ho is a writer who, two years ago, was short on money, so decided to try to improve his financial situation by creating racy web-based cartoon strips (also known as webtoons). Known as “19+” titles, these webtoons may only be read by those aged 19 or above. Seon Ho’s titles have become extremely popular. But they have had a very unexpected effect on his sex drive. Since he began writing, he cannot feel aroused.