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, I, 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 initiating it. Since then, we've been trying to make up for all the things we've missed...