Aka oni Ao oni

A sort of an fan art of an old Japanese folk story called: 赤鬼青鬼　"Aka oni Ao oni" (Red demon Blue demon).
It is a story about frienship of two deamons, and strugles of the Red demon.
In case you are wondering what is written in (hiragana, katakana, and kanji) Japanese:
Near Red demon is written "Red demon"
Near Blue demon is written "Blue demon"
And in the middle is a piece of letter that Blue demon left for Red demon, it says:
So I thought it through, I will go far far away.
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Tools I used are: Mechanical pencil 0.5, Mitshubishi Uni Pin inker, Faber Castel set of 12 watercolors, and 300g paper.
Time I spent on this: about hour and a half, because I was in a hurry; letter writing and some deatels I had to do, I did while driving in a bus. xD
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So here you go a deviation after a while, hope you will at least a bit enjoy it.