This work depicts Rei Mizuna's first insertion, realistically portraying her tiny pussy being mercilessly stuffed with a thick male fist. Each time a full punch is thrust in, her body shakes with creaking sounds, screaming as she repeatedly reaches orgasm. Bound to a guillotine device, she undergoes intense piston-like deep throat action, while the scene escalates into a passionate threesome where fisting is relentlessly repeated. Her pussy becomes inflamed, swelling intensely as if it might break apart at any moment.