Toki no Seijuu

Yuki is a carefree high school student whose life takes a sudden turn when a mysterious young man shows up at her door. Claiming to be a distant relative, he moves into her home after the recent death of his parents. But his true purpose is far more sinister: he has been sent to kill Yuki before her sealed memories can be unlocked.

As the stranger gets closer to her, Yuki begins to sense that something is wrong. The secrets buried in her past hold a power that someone desperately wants to keep hidden. With danger lurking in her own house, she must uncover the truth about who she really is and why her memories are a threat.