Cast
Makers
After seeing my twin sister, Itsuba, masturbating with VR, I impulsively asked her to let me touch her breasts. "We're siblings! That's impossible... but if it's just a little..." Unable to suppress her erotic curiosity, we eventually reached the brink of penetration. We decided on a rule: "If only the tip (3cm) is inserted, it doesn't count as having sex." Thus, we began repeating this "glans-only" sex. However, sliding the cock in and out of the pussy, even just the tip, felt incredibly good, and we both started wanting to push deeper... The twin siblings' life of "tip-fucking" on the verge of full penetration!
