"Hey, don't you notice something?" she suddenly speaks to me. No, don't you notice something about Yuka? she presses, and I'm like, "Ah, come on... so..." she continues. "It's because I'm premenstrual, I'm feeling horny...!" she confesses. The situation is: "My girlfriend, who gets horny and aroused right before her period, completely turns into a slut! She makes my dick rock hard and squeezes out every drop of semen!!" Every month, I'm troubled by her turning into a super little devil S when she's premenstrual. Even kissing doesn't satisfy her at all, and she holds me from behind, forcing me to get hard with a footjob. I'm treated like a dick while being put in an embarrassing bare-dick position, my ass licked, and I'm forcibly turned on too. Lately, her arousal has been intense—she inserts me on top in cowgirl position on her own, and I've had my cum drained out like crazy. It's erotic, but every month when her period approaches, my heart races.