My Girlfriend is My Stepmother Manhwa also known as (AKA) “새엄마는 내 여친 / My Stepmom Is My Girlfriend”. This Completed webtoon was released on . The story was written by Viagra and illustrations by Gyou. My Girlfriend is My Stepmother webtoon is about Drama, Mature, Romance story. My Girlfriend is My Stepmother Manhwa – Summary When your dad brings home a significantly younger woman to introduce her as your new stepmother, it’s pretty normal to disapprove of the whole deal. And it’s pretty standard to hate this new woman invading your household. That’s exactly what Sung-hoon plans to do when he meets Yeoni, his dad’s girlfriend, but…he really wasn’t counting on how hot she is, or how determined she is to befriend him. What do you do when your relationship with your sexy stepmom-to-be gets increasingly steamier? Time to come…and find out!