Honda Toru is an innocent, kind, and confused high school girl who has lived with her mother since she was a child. But a car accident took her mother's life, leaving Toru an orphan. She moved to the mountains with all her belongings and lived alone in a tent in the forest. As fate would have it, Toru accidentally walked into an old mansion and met a strange man, Kusama Shigo. It turned out that he was the cousin of Kusama Yuki, who was recognized as a prince in the school, and this mansion was where Yuki lived. That night, there was a landslide in the forest, and Toru's tent was buried by the rocks. Fortunately, Yuki and Shigo rescued her in time and let her live in their mansion temporarily. The secret of the Kusama family for hundreds of years was discovered by Toru. As long as Yuki, Shigo and others were hugged by the opposite sex, they would immediately transform into the corresponding zodiac signs in the twelve zodiac signs. Another mysterious boy, Ajia, not only transformed into a cat but also hid a bigger secret in this family. The head of the Kusama family issued an order to erase the memory of Toru, who knew the truth. And Tohru's words "Even if my memory is erased, please continue to be my friend" moved Yuki, Akai and others. She was more like a ray of warm sunshine, illuminating the gloomy Sohma family.