Durarara!!

An enchanting creature named Celty, a true dullahan, arrives in Japan with the aim of finding her head, which was stolen from her homeland 20 years earlier. She finds herself forced to negotiate with a young boy in Ikebukuro, now working as a courier. Having become an urban legend, the Headless Rider, she rides her faithful black steed, transformed for the occasion into an unsettling motorcycle. It is then that a gang called Dollars decides to get their hands on Celty's head…