Yumi was working at the hotel's front desk, a star position, making the most of her beautiful appearance and body, but her specialty was handling complaints. The front desk receives a variety of complaints, but when Yumi goes to the guest's room to deal with them, not only do the complaints subside, but the guest is so satisfied that they become a repeat customer. What is the method of handling complaints that only Yumi can do, which unfolds secretly in a hotel room?