Negima!? Magister Negi Magi
You hide the 'heart' with a 'sword' and read it as ninja. It is a little different than how you write 'serious' and read it as 'for real'.
Episode 9 | TV-MA
Out in the woods for Magic Training Camp, Negi attempts to teach his partners the basics of wizardry, but haunting dreams of his father leave him fatigued and vulnerable.
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