Reiko Kobayakawa lives in a mother-and-son household while her husband is away on a work assignment. Lately, she finds herself drawn to her son's friend, Kaori, who frequently visits their home. However, his obsession with maternal figures is intense—he forcefully pins her down when she's off guard. Subjected to his relentless, sticky foreplay unlike anything she's experienced with her husband, she's made to climax over and over. Her heart trembles under his vigorous, youthful thrusting, her body gradually melting away. Day after day, as she's repeatedly desired and taken, Reiko finds herself increasingly liberated, both mentally and physically.