Hot and steamy you say… have you tried “I Need Romance” ?
https://www.viki.com/tv/3806c-i-need-romance?q=I%20need%20r
https://www.viki.com/tv/8124c-i-need-romance-2?q=I%20need%20ro
https://www.viki.com/tv/21528c-i-need-romance-3?q=I%20need%20roma
Next to that I made a topic for the more mature drama years ago, you can find more suggestions in there:
https://discussions.viki.com/t/looking-for-a-bit-more-ehh-mature-kdrama/296