DVAJ-726 My girlfriend was away on a family trip for three days, so I spent three days having sex with her friend (provisional title) Riho Shishido

My girlfriend, me, and her friend Riho often hang out together. When she's not looking, Riho holds my hand or leans in, so it seems she has a crush on me. One weekend, she goes on a family trip, so we don't see each other for three days. On the day she leaves, Riho and I end up having an affair without either of us inviting her. After that, we spend the day having sex over and over again, trying to make up for what we hadn't done before. We spend almost everything having sex except for eating and sleeping. Our time together passes by quickly, and the day she is due to return from her trip is fast approaching.