I’m the brave puppy that will save the villainess

My name is Coco. I’m a fluffy white dog with the most beautiful fur. “If there’s a next life, please… be born as my daughter. Okay?” I lived a happy life with my sister, and then I crossed the rainbow bridge. ‘…But why does everyone hate my sister?’ No! My sister’s happiness must be protected—by her brave dog! …So I crossed the rainbow bridge once more, and this time I was reborn as her family’s five-year-old adopted daughter. But getting close to my sister isn’t as easy as I thought. “Don’t call me sister. You’re not my sibling.” It’s okay even if she doesn’t recognize me as Coco. Because this time, I’ll be the one to reach out to her first. “I just… I just wanted to be close to you, Lady Chloe.” So please, sister… Won’t you be friends with me again?