There are several long-form sweet and pet-themed ancient costume novels that I can recommend. One is called "Qing You Ji" by author Yao Yan De Hong. It tells the story of a single woman working in a big city who accidentally obtains a portable space and later learns that she is the daughter of Hong Yun, a character from the ancient Hong Huang continent. The novel follows her journey as she navigates through the challenges of the ancient world. Another recommendation is "Huang Wei Jiang," a historical romance novel about a female protagonist who is a skilled warrior and fights on the battlefield. She disguises herself as a man and wields a long sword, eventually embarking on a mission to save her country. I hope you enjoy these novels!