The first time my girlfriend brought Momo to my room, I was strongly impressed by her - my girlfriend's seductive best friend, especially when she leaned in and asked me to kiss her. In that moment, I realized that I had fallen in love with her! That night, after we had finished drinking, my girlfriend fell asleep on the sofa, which was the perfect time for me and Momo to make a secret agreement. She demanded that I prove my true feelings for her by not having sexual relations with my girlfriend and not masturbating for a month. The main purpose was for Momo to be able to have more intimate moments with me after the month of separation, which was three days away from my girlfriend.