You won't be able to work unless you fill the vacancy left by Mr. Yamanaka's sudden retirement. I decided to have my wife, Yurika, work as a short-term assistant. However, Yurika is a very serious person. Even though I said, "If you do it seriously, it won't end, so it's okay," she cleaned every corner and tried to listen to everything the caregiver said. Alas, my wife is too serious; she's not suited for long-term work…