Be mine only while big sister is away on a business trip! The rampage of 'Karen,' who has grasped her sister's boyfriend's weakness! Hold back on masturbation and sex, and have sex multiple times while big sister is gone to make each other feel really good! After lifting the abstinence, we'll desperately seek each other out and dive into sex! This is definitely the best work in the series! Her affair with her sister! It wasn't just an affair, it was serious...! Over several days, we had sex countless times! There's no going back now!
