My little sister "Mikan" has an estimated G-cup chest, and as a virgin, I can't help but feel anxious every single day. What would you do if you happened to run into your own sister at a soapland by chance? Even though I know it's wrong, how could I possibly refuse when my adorable sister says, "I'll help you practice losing your virginity"? Torn by the guilt of betraying our sibling bond, my cock still throbs with excitement. Watch as our relationship takes unexpected turns in this thrilling, full-featured story.