Kuromajo-san ga Tooru!!

Suspicious Confectious Cake Contest (Part 1) (1x27)

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As a cake contest is held, Gyubid teaches Chiyoko a duplication spell to make a copy of herself to look for rare chestnuts for a mont blanc. Things soon get awkward as the copies start making copies of themselves that deviate further from the original with each duplication, so Gyubid and Chiyoko set off to capture all the copies.