I'm Ryosuke. I live with my wife, Akari, in a company apartment building that's about 30 years old and nicely aged. The other day, our bathroom broke down due to some issue with the plumbing. Since it was late, we decided to call a "plumbing emergency service" or what they call a "neighborhood plumber." It turned out that the "middle-aged plumber" was a man of few words, emitting a serious and taciturn atmosphere...