Kisaragi Miyako, a descendant of a prestigious family, found herself in a difficult situation due to a lack of money as her parents wouldn't allow her to take on part-time work. One day, she receives a job offer from her mixed-blood noble classmate, Julian, to work as a maid at the residence of a foreign ambassador. After successfully persuading her parents, she visits the mansion to work as a resident maid, but for some reason, she ends up in a sticky relationship with Julian, leading to punishment from the strict head maid! As Miyako, who is not used to the sensation of wearing a chastity belt, makes repeated mistakes while working, she is subjected to even stricter punishments. Despite being kind, the thorough constraints imposed on her lead her to find pleasure in the loss of her freedom──. This is a fresh and heartwarming youth bondage play yuri story brought to you by the author Tanaka Masami!