Maburaho

Synopsis

Now that Yuna, Kuriko, Rin, Yamase and Dr. Haruaki Akai know who are responsible for the remaining ashes of Kazuki, they are left with a choice as to whether to return the ashes to Kazuki to make him human and lose all of his memories or to have his ashes pulled from his body and remain as a ghost with his memories. Yuna wishes to return her remaining ashes to Kazuki, but Yamase does not. Yamase then runs away and Yuna, Kuriko, and Rin chase her to convince Yamase to give back Kazuki's ashes. Yamase is finally convinced and gives Kazuki's ashes back. The next day Kazuki returns to a human except, this time there are multiples of him.

(Source: Wikipedia)