Madoi Shiroki no Kamikakushi | まどひ白きの神隠し

One day during winter. It all started with a flickering mirror inside a certain house. From that flickering mirror came out Roka, a girl with fox ears. The protagonist, Takuto, and his younger sister, Shiina, threw themselves in to the mirror following Roka, and wandered into "the other side." In there was a world similar but still different to the human world. Spirits, demons and all other sorts of non-human beings, a world of gods. "Welcome to the hidden world of the gods" Mikoto, the otherworldly girl with rabbit ears. Chiyo, the tsukumogami running a teahouse. Roka and her mom, the nine-tailed foxes. Shiina, who got spirited away together with her brother. Takuto will work together with these girls to find a way back home, but... Through these intereactions, he will learn the true nature of gods, and about secrets between siblings. Humans and gods, 2 worlds, 4 girls. He stands in the snowy land of the gods, and wonders- "Where do you belong?"