"No... I'll get pregnant...!" Her husband was away on a business trip overseas for 20 days, and her husband's subordinates were penetrating her every day. (Runyu Ryu MFYD-069)

Runrun, whose husband runs a company, is away on a business trip for three weeks. Having given up on having children and experiencing a ten-year sexual drought, Runrun is feeling bored. Then, she encounters her husband's subordinate, Miyashita. "Miss Runrun, there's something I want to tell you..." However, just minutes later, Runrun is violated and penetrated by Miyashita. After a ten-year hiatus from sex, she feels the intense pulsation of sperm inside her womb. Runrun's desire to get pregnant is ignited, and from that day forward, a 20-day cycle of continuous penetration, destined to lead to pregnancy, begins...