After her mother-in-law’s death, married woman Saki begins living with her grieving father-in-law. Once a devoted husband, he has fallen into deep depression, barely eating or speaking. Feeling pity and a sense of duty, Saki tells him she will do anything to help. She never expects his shocking request: to insert himself into her for only ten seconds. Reluctantly agreeing out of compassion, she is stunned when their physical chemistry proves overwhelming. What was meant to be a brief, controlled moment quickly overwhelms her senses. Despite the strict time limit, the intense compatibility drives Saki to an unexpected and powerful climax, pulling her into a forbidden attraction she can no longer easily resist.