Soulhounds
Soulhounds follows Reiden, an 18-year-old who returns to his grandmother's home in Choshi, Japan, with his older sister Aiko and their cousin Taki after her funeral. While standing beside the grave, Taki discovers a mysterious crystal. Reiden consumes it, unknowingly awakening a connection to Kuranami, an ancient entity divided into ten crystals.
As Reiden and his group face powerful monsters and increasingly dangerous enemies, he must learn to control the strange power growing within him while uncovering the truth behind the crystals and Kuranami.