Aina, happily married and enjoying her life, suddenly finds her husband's weakness exploited by a subordinate. One day after work, she is forcibly creampied inside the office. Unable to confide in anyone, the demands escalate rapidly—despite her husband being nearby, she is repeatedly and obsessively filled with cum inside her vagina. While growing distrust toward her husband, Aina gradually surrenders to the pleasure before her, becoming entangled in a new, twisted relationship.