OBA-218 A married woman named Mimiko Aida invites her lover to her home and indulges in sex while her husband is away.

"I'm sorry. I suddenly feel unwell..." On Saturday, Mimi cut out in front of her husband and son heading to the amusement park. And her husband and her son go to the amusement park while worrying about Mimi. A few minutes later, Saburo, a young friend who met at a part-time job, comes to the house. The two of them usually kept their eyes off their families, but today they decided to have "time limit unlimited FUCK" at Mimi's house until the family came home.