[ROE-320] My mother and I's short-time exam life: A 20-minute break for creampie sex supported me through the exams I took... Rin Okae (Censored)

This is my second year of retaking the exam, and I was feeling anxious as I studied at home. My mother always supported and encouraged me, and for her sake, I had to pass the exam this time. One day, my mother offered to give me a massage during her break, so I asked her to do so... I was frustrated from being cooped up in my room all the time, and when I saw my mother defenseless, I got an erection. My mother looked surprised for a moment, but then she smiled seductively and put her hand on my crotch as if she had understood...