For Mizuki Sakino's third MAX-A release, she takes on three sex sessions designed to discover whether she can orgasm from penetration. First, a powerful vibrator teaches her body to cum. Next, cunnilingus and fingering heighten her sensitivity before slow sex and deep cervical stimulation target the spot she feels most. The final session adds relentless follow-up thrusting for her roughest sex yet. Will Mizuki finally achieve an internal orgasm?