Mizutani Mero, 20, is a college student who goes to school normally and has a normal relationship. Recently, she can't help but be interested in her anus, and when she plays with it herself, it feels good... but she's too embarrassed to tell anyone around her. Then, she happens to see an adult video where an AV actress is having anal sex and she gets really excited! She wants to feel good from anal sex too... so she comes to the shoot! Her first nude sex → anal virgin sex → shocking two-hole sex - this is an astonishing debut work that takes her up the ladder to adulthood in one go!