Aina Shinkawa, a refined beauty from Kyoto, arrives to marry her beloved as his bride. Her future father-in-law, Seiichi, decides to test her suitability by assigning her bridal training and practical caregiving exercises. However, Aina is too well-bred—she lacks basic housekeeping skills and is a quintessential young lady of privilege. As Seiichi begins teaching her domestic and caregiving duties, he notices her naive obedience and, mischievously, intensifies the training. Forced kissing with mouth-to-mouth chewing, blowjobs as etiquette before using a urine bottle, cleaning duties performed with bare buttocks exposed—relentless sexual harassment becomes routine. Gradually, Aina’s deeply submissive body begins awakening to pleasure.