My little sister, who ran away from home after fighting with our parents, ended up staying in my one-room apartment. I couldn't help but notice how much her body had grown in the short time I'd last seen her... Living close together in a small room, I couldn't help but notice her. I couldn't help but reach out to touch her as she slept, defenselessly exposing her shapely ass to her sweaty cleavage, and she said, "...it's okay, touch me..."!? ※This work is a story about a runaway big-breasted sister and her tight, horny cohabitation in a tiny one-room apartment. This is an excerpt from "Yuri Fukada" (product number: dvaj00543).