This is Moon And Goldfish
Makoto is a student at an art university. She was once captivated by her art class teacher, Ira when she was just 12 years old. Ira vanishes from the scene and, not until six years later, appears before Makoto at an art exhibition. Surprisingly, she looks the same as Makoto remembered and has a secret to hide. Although still human, Ira seems to have a thirst for blood.
