Ceres: Celestial Legend Vol. 8 (manga)

Miori

No more deception, no more lies--now that Aya and Tôya have finally let down all their barriers and come together, that is. But will something else--something outside their love--tear them apart? Miori Sahara seems a nice enough girl--goes to Aya's school, has a lot in common with Aya...looks a lot like Aya, actually. She says she's searching for her missing boyfriend, who's been gone a year now. After an accident robs Tôya of his memories, will Aya turn to Yûhi once Tôya goes back to his "real" girlfriend, Miori? A love like Aya and Tôya's is supposed to last forever...has everything that's happened between the two of them this past year been a lie after all?!