Ochakai he no Shoutaijou (2016)

Donna, who was raised on a family plantation in the countryside, spent the day hard at work harvesting, as usual. That day, news came of her grandmother's sudden passing, disrupting Donna's peaceful country life. She was told by her parents to head to her grandmother's residence in the city to settle her belongings. The big city London, which she had never been to in her life. The duty of settling her grandmother's belongings, which she reluctantly accepted. The moment she was filled with excitement yet unease from being in the unfamiliar city, the visitor bell rang. When she opened the door, she was met with unfamiliar guests, who said they'd arrived to have tea with her grandmother. What her socialite grandmother had left behind, was but a fun tea party...?