Rin, who studies zoology at college, had a dream. That dream was to reunite with the silver lion that saved her when she was little. Her wish is fulfilled by a chance partnership between a safari park and her university. Rin is overjoyed, but this lion is hiding a huge secret.
Somehow, said lion transforms into a lion man that calls himself Ashiro, who then pounces on Rin with furvor... Zoology student Rin wants nothing more than to reunite with the lion that saved her when she was little. By chance, that wish is fulfilled... but not in a way that Rin could ever have suspected...!