Life and Death Sacrifice

One tail cries, two tails jump, Three tails and four tails laugh on the grave, Five tails and six tails have sharp teeth, Seven-tailed and eight-tailed beauty, Nine tails fly into the sky, The ten tails are made again. The weird ballad has haunted me for more than twenty years, and no one could understand its meaning, until a fierce man broke into my life. He taught me skills, saved me from fire and water, cast down evil spirits, and fought monsters. I thought he was the noble man in my life, until that day when his hand reached for my heart and wanted to sacrifice me to heaven...