Tsukihime: Fool's Errand (2009)

A few months after the end of Tsukihime, life at the Tohno mansion has more or less returned to normal. Akiha is busy with school and managing the Tohno estate, Ciel gives Shiki regular after-school lessons to help him catch up on everything he missed, Hisui is ever happy to await Shiki-sama at the front door, Kohaku is as cheerful and crazy as ever and Arcueid has finally gotten firmly in touch with her feline side. Surely, this can't go on like this for long...