A firsthand account from Reiko Yamaguchi, an aggressive big-titted woman with 98cm (G-cup) breasts who gets horny during her period. Enjoy her masturbating with a kegel ball, inserting a vibrator, and engaging in various positions including doggystyle with a bloody pussy, missionary, and cowgirl. Later, she rides with a kegel ball in her ass. On the second day of heavy bleeding, she pleasures herself with slippery menstrual fluid, jerking off so intensely that she cums hard.