The house left to me by my parents is abnormally large for a single man to live in, always feeling too spacious and inconvenient to use properly. Recently, however, I acquired a new casual sex partner. She's a young married woman named Tsubaki, whose husband is busy working from 9 a.m. to 5 p.m. every day, so during those hours, she comes to me wearing full makeup, seeking sex exclusively with me. She always arrives perfectly groomed, bringing fresh excitement to my daily life. Our affair is creating a new kind of romance within this overly spacious home.