HUNTB-741 I didn't realize my family had grown! "Nice to meet you! I'm going to be your sister from now on." Sex with my newly acquired stepsister was too good! Starting from university...

Starting from university, I finally achieved my dream of living alone. Suddenly, a woman I didn't know appeared! Apparently, she is going to be my sister. My parents remarried without consulting me, and now she's my stepsister. What's more, our houses are close by, so she frequently visits and we help each other out. She offered to clean up my room, but she found my AV collection and got all worked up after watching it! Yesterday she was a stranger, but now she's family—my stepsister—and we ended up having sex!