12화: 카즈키가 마지막 마법을 사용해 유나를 구하고 유령이 된다

As a result of the previous two episodes, Yuna has contracted a magical sickness that threatens to turn her into ash by depleting her magic count. Kazuki uses his second last magic attempt to fix her, but that doesn't fix Yuna. Kazuki gives it one more try using the last of his magic to save her life. Instead of turning to ash, however, Kazuki becomes a ghost. (Source: Wikipedia)

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