PPPD-802 Secretly fucking her best friend Megumi Meguro's boyfriend

My girlfriend's best friend came to our house, all three of us had a party with a bottle of good wine. Because we were so happy, she drank too much and my girlfriend went to sleep early and I decided to stay on the sofa to make room for that cute girl. But sleeping on the sofa doesn't seem to be going well with my girlfriend's girlfriend.