A busy mother asks "rental mom" to do housework and take care of her son. My son is very excited about the beautiful rental mom Yui who came! A son who teaches Yui to study, to clean, to cook, to wash, and to do anything if asked. However, she gets an erection when she sees Yui's chest. Then Yui gave a blow job to her son Ji-Po! And the naughty request for obedient Yui escalated ...