He is My Master

Izumi Sawatari and her younger sister, Mitsuki Sawatari, are in search of employment after running away from home. They find work as maids in the grand mansion of 14-year-old millionaire Yoshitaka Nakabayashi. Initially, their new roles seem straightforward, but they soon discover that their young employer is a demanding and authoritative figure who insists on being addressed as "Master". As they navigate their new lives, the sisters must contend with the challenges of serving a master who pushes them to their limits.