Celia lived a mundane life until she encountered Thomas, a mysterious young man who was a member of the Office, a secret society that protects the world from crimes related to the manipulation of time and dimensions. Moreover, she turns out to be the Time Master, an exceptional individual with immensely powerful abilities. However, lurking in the shadows is the threat of the Horla, an assassin who appears to be connected to Celia's powers and Thomas's past.
4 parts