After losing custody of her son to her husband in a divorce, Rin Amamiya is consumed by regret and loneliness, secretly longing for her bond with him. Seven years pass—her ex-husband remarries, and she's granted only one annual visit. Unable to forget the warmth they once shared, she pleads, "Don't forget me..." as she forcefully kisses him. She gropes her own breasts and takes his erect cock into her mouth. "We're no longer mother and son—give it to me deep," she demands, desire and love intertwining uncontrollably, leading them into forbidden incest. As their bodies unite repeatedly, intense pleasure and primal urges collide.