I was supposed to go on a hot spring trip with my parents, but suddenly it turned into a trip with my sister! My overprotective sister who can't leave her little brother alone; being alone with her is such a hassle… or so I thought, but then came an unexpected turn of events! My sister, who has bad sleeping habits, crawled into my futon and exposed her massive breasts! Moreover, as she rolled over, her huge breasts pressed against my face!!! The intense closeness made me so excited that I got a full erection! Noticing this, my kind and overprotective sister tried to calm my excitement… and we ended up committing incest!
