With her husband away on a business trip, Miki sits on the sofa and masturbates to soothe her overheated body—only to be spotted by her father-in-law. The next day he offers to massage her tired body, but his hands gradually turn the massage into intimate caresses. She says they should not do this, yet slowly gives in. Her dark-red lips slide along his cock during a wet blowjob, then she climbs on top and rides him hard. Moaning that it feels good, Miki begs her father-in-law to cum inside her, and he eagerly fills her with a creampie.