SKMJ-334 Big Brother's Little Sister Observation Diary Vol.1: Pranks that let you sleep and eat your fill, and sex inside you.

The first one is Haruno-chan. She's a cute girl, a high school girl. Her breasts will start developing from now on. She has a prominent buttocks. Even my brother couldn't get enough of her when I put her in my little mouth. The second one is Aoi. She looks like an adult, but she's still a girl. If bad guys get close to me, I'll blow them all away.