Memory Restorer: the Tenderness of Forgotten

In a future world where memories can be repaired, she is a top memory restorer who specializes in restoring memories for amnesia patients. When a mysterious man shows up at her clinic, she discovers that she can't repair his memory. What's even more frightening is that there seems to be something wrong with her own memory. When the truth was revealed, she discovered that it was all related to a shocking conspiracy.