A sister secretly practices putting on a condom on her sleeping brother's morning erection. Naturally, her brother finds out and says, "I'll help you, so let me practice," letting her touch her breasts and making her excited brother ejaculate with a handjob. Horny for each other, the brother and sister end up committing incest by inserting themselves under the pretext of practicing sex... *This work is a part of the "Borderline Incestuous Life with a Sister Who Lets Me Insert Up to 3cm of the Tip" series. This is an excerpt from " Aoi Kururugi" (product number: dvaj00371).