Chiyo met Mutsumi, who was three years younger than her, during elementary school and continues to take care of him even until now, holding a slight preoccupation that she would not be thought of as anything more than a meddlesome older sister to Mitsumi who seemed to live in a different world. However, showing the clothes that she wore to a company party, Mutsumi's reaction exceeds expectations?! A raunchy sweet love story between a handsome womanizing artist and an older, meddlesome office lady.