Mao Hamasaki, an intelligent female manager working at a certain company, sighed today as she looked at the oldest man in the department, a middle-aged man who was also known as a "window-sitter." The company had been encouraging him to retire under the name of an early retirement program, but he just kept repeating his lackadaisical response, as if he was pushing against a wall... One day, the window-sitter was absent without permission, so Mao, the boss, decided to go to his apartment to check on him...!